I have tried everything I could I do not understand what this question wants me to do.

a {
  text-decoration: none;
I have tried putting it in here nothing
}

#wrapper {
  max-width: 940px;
  margin: 0 auto;
}

#logo {
  text-align: center;
  margin: 0;
}

h1, h2 {
  color: #fff;
}
nav {
  text-align: center;
  padding: 10px 0;
  margin: 20px 0 0;
}
nav ul {
    list-style: none;
    margin: 0 10px;
    padding: 0;

nav li {
    display: inline-block;
I have tired this as well nothing
}
nav a{
    font-size:800;
    padding: 15px 10px;
I have added the values above in here and have erased the nav a below nothing
}
nav a li{
      font-size:800;
    padding: 15px 10px;
I have tried this trick also no good
}
nav a ul{
      font-size:800;
    padding: 15px 10px;
I have tried this trick also no good
}
nav li a{
      font-size:800;
    padding: 15px 10px;
I have tried this trick also no good
}
nav ul a{
      font-size:800;
    padding: 15px 10px;
I have tried this trick also no good
}
nav a {
  color: #fff;
  font-size:800;
    padding: 15px 10px;
I don't know how many times I tried this

}

nav a:hover {
  color: #32673f;
I went as far as to put it in here nothing as well
}

h1 {
  font-family: ‘Changa One’, sans-serif;
  font-size: 1.75em;
  font-weight: normal;
}

img {
  max-width: 100%;
}

#gallery {
  margin: 0;
  padding: 0;
  list-style: none;
}

#gallery li {
  float: left;
  width: 45%;
  margin: 2.5%;
  background-color: #f5f5f5;
  color: #bdc3c7;
}