Corrected sentence: Animals hide food in burrows, tree hollows, or in the ground.
This sentence is good! It tells who (Animals), what they do (hide food), and where they hide it (in burrows, tree hollows, or in the ground).
- Who? Animals.
- What? hide food.
- Where? in burrows, tree hollows, or in the ground.
Small note about commas: when you list three places, put commas between them. Some people also put a comma before the last word (the comma before "or"); both ways are okay, but adding that comma is a common style.
Try this: Write a sentence like the one above but about birds. For example: "Birds hide food in trees, under leaves, or in holes."