https://developer.mozilla.org/en-US/docs/Learn/HTML/Multimedia_and_embedding/Responsive_images responsive images

image alt text

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/picture

https://stackoverflow.com/questions/25036597/how-to-enlarge-an-image-on-hover-or-click

https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Building_blocks/Image_gallery perhaps correct for gallery?