One major similarity between napolean and snowball is

Both Napoleon and Snowball definitely want the the farm run by animals by getting rid of Mr. Johns and they both are instrumental in spreading Animalism. But they are also different, Snowball wants animals to work together and run the farm, while Napoleon is more totalitarian and eventually usurps power. 

Iwould go with c both type but i wouldn’t go with my answer because it might be wrong.

Question 4 i think is expository