Previous posts' photos not showing

Hello,

For some reason, the photos of previous posts (not latest/featured post) on the landing page of my blog are not showing up. All the other information such as title, date, excerpt etc. are showing up. This only happened recently, so it may be that I selected a certain option I shouldn’t have. Would you be able to help me with this?

In addition, I was wondering if I could get rid of the “Categories” section below each blog post. It takes up quite a bit of space, and I would like to just show the Social Buttons instead.

Thank you very much for your help.