Learn HTML by Building a Cat Photo App - Step 1

Tell us what’s happening:
Describe your issue in detail here.

  **Your code so far**
<html>
<body>
  <h1>Hello World</h1>
</body>
</html>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Linux; Android 10; itel L6503) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.164 Mobile Safari/537.36

Challenge: Learn HTML by Building a Cat Photo App - Step 1

Link to the challenge:

you should change this text. What have you tried?