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HTML How to Make a Website Styling Web Pages and Navigation Make a CSS Image Gallery

I don't understand what this question is asking me to do https://teamtreehouse.com/library/how-to-make-a-website/styling

I don't understand

a {
  text-decoration: none;

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

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

h1, h2 {
  color: #fff;

nav a {
  color: #fff;

nav a:hover {
  color: #32673f;

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

This is the question; Add CSS that will allow all images to fill their parent element.

I don't understand what I have to do?

1 Answer

Jennifer Nordell
Jennifer Nordell
Treehouse Teacher

Hi there! What we want to do first is select the img tag. Then we want to make it fill the parent container. That is to say it will occupy 100% of the width and height of the div or whatever other element it might be inside. And this is how we accomplish this:

img {
  max-width: 100%;

Thank you for clarifying that