One of the most difficult is to create conflict.
It is easy to describe an event. It is difficult to turn that event from an announcement into a story.
I can easily picture a cat sitting on a mat, looking around, staring at the walls, looking out the windows, and waiting… waiting for something to happen. It can be a pretty cat, an old cat, a battle weary cat. All of this can hint at, sort of dance around the edges of a story, but until something happens it is not a story. Until then, this is just a scene or a character synopsis.