<img> tag is used to add images. Always think about alt text for your images. It explains things to the user when the picture fails to load, and it also helps out screen reader users.
You can set a basic image size with HTML width/height, but for responsive design it's better to control it with CSS.
html
<img src="team-photo.jpg" alt="Our team working together" width="600" height="400">You should see
An image will show up, and if it can't load, the alt text will be used instead.