Try with below, it should resolve your issue.
<!DOCTYPE html>
<title>Advocates For a Caus</title>
<style>
@charset "UTF-8";
body {
margin: 0;
}
.header {
width: 100%;
background-color: #666666
}
body div a img {
width: 1366px;
height: 160px;
}
.nav {
height: 40px;
background: #333;
}
.nav ul {
margin: 0;
padding: 150;
}
.nav ul li {
list-style: none;
}
.nav ul li a {
text-decoration: none;
float: left;
display: block;
padding-left: 300px;
padding-top: 10px;
color: white;
}
.nav ul li a:hover {
color: black;
}
.header1 {
margin-left: 10px;
margin-top: 10px;
}
.footer {
width: 100px;
height: 100px;
background-color: black;
float: left;
}
</style>
<body>
<div class="header">
<div class="nav">
<ul>
<li><a href="home.html">Home</a></li>
<li><a href="support.html">Support</a></li>
<li><a href="contact.html">Contact</a></li>
</ul>
</div>
</div>
<div class="header1">
<h1>What is depression?</h1>
<div class="body1">
<p>Before we start, we need to explain what depression is. Depression is a mental issue that can make someone feel sad all the time and make them feel worthless. We are going to answer 6 important questions about depression today.
</p>
<ul>
<li>Why is depression such a big issue?</li>
<li>Why do people get depression?</li>
<li>Why should I help people with depression?</li>
<li>How can I cope with my depression?</li>
<li>How can I help my friends and family members who have depression?</li>
<li>How can I avoud Depression?</li>
</ul>
<p></p>
<div class="header2">
<h1>Why is depression such a big issue?</h1>
<div class="body2">
<p>Before we start, we need to explain what depression is. Depression is a mental issue that can make someone feel sad all the time and make them feel worthless. We are going to answer 6 important questions about depression today.
</p>
<ul>
<li>Why is depression such a big issue?</li>
<li>Why do people get depression?</li>
<li>Why should I help people with depression?</li>
<li>How can I cope with my depression?</li>
<li>How can I help my friends and family members who have depression?</li>
<li>How can I avoud Depression?</li>
</ul>
<p></p>
<div class="header2">
<h1>Why is depression such a big issue?</h1>
<div class="body2">
<p>Many people dont see depression as that big of an issue because theres things like cancer, and heart diseases and all these physical diseases, which are a bigger problem right? Wrong! Depression can give you suicidal thoughts,
and about one million people commit suicide a year. Depression can make things you used to find fun boring, it can make you really sad and think your worthless or helpless. Just because it is not a physical health problem
does not make it any less important.
</p>
<div class="header3">
<h1>Why do people get depression?</h1>
<div class="text3">
<p>Depression can be caused by many different factors. Depression can run in your family or it could occur because of your personality. Depression can also occur from drug and alcohol use or abuse. One of the biggest causes
of depression is PTSD(Post Traumatic Stress Disorder.) PTSD is a mental illness that can occur when you go through something traumatic in your life.</p>
<div class="header4">
<h1>Why should I help people with depression?</h1>
<div class="body4">
<p>You should help people with depression because it is the right thing to do. Depression can make someone feel helpless with there life and it makes them always be sad. Helping someone you know that has depression
could prevent them from commiting suicide, which is a great thing to do.</p>
<div class="header5">
<h1>How can I cope with depression?</h1>
<div class="body5">
<p>Coping with depression is not the easiest thing to do sometimes, but it is possible. A good way to cope with depression is getting rid of all the negative things in your life. Talking to a therapist
and getting your feelings out to someone also helps greatly. Drinking less alcohol also can lessen your depression.</p>
<div class="header6">
<h1>How can I help a friend or family member with depression?</h1>
<div class="body6">
<p>There are many ways to help a loved one that has depression. Listening to them is a great way to support them, letting them now that someone cares about them can make them feel more important.
You can also offer them activities that can distract them from depressing thoughts. Doing a little bit of research can help you understand them better too.</p>
<div class="header7">
<h1> How can I avoid depression</h1>
<div class="body7">
<p> To avoid depression you need to avoid stress. Avoiding stress can help you avoid depression because stress is a big factor to causing depression. Eating and sleeping is good to, a good
diet and a healthy amount of sleep can make you feel good throughout the day. Avoid negative things and people, avoiding anything or anyone negative could easily help you avoid depression.</p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
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</div>
</div>