hey alaina- could i ask for more points on this? because you asked 5 questions, not one. please, and thank you!
1. the hardest worker on the farm was boxer, and his motto was "i will work harder", which he never failed to carry out.
2. snowball and napoleon often argue about decisions to be made on the farm. they both hold a high position, since they're pigs, and the animals don't know who to support because they know both are reasonable. though at the end of the day, they find a compromise.
3. (i'm not sure if you mean simplify to make it easier, or you mean when squealer altered it- ex. no animal shall kill another animal without cause. i'm going to assume the first one, because your question says chapter 3 :)) the pigs had to simplify the commandments because it was difficult for the animals to understand them. it was vital for each and every animal to knew what they said and meant, even if they couldn't read them. they were the rules that were never meant to be broken and they were to be lived by every day on animal farm since the rebellion.
4. squealer constantly has to remind the animals on the farm about life when mr jones was in charge. obviously, when the two times are compared, the times now are nowhere near what it was like before the rebellion. after thinking of this, the animals realize that squealer's decision is for the best.
5. napoleon best represents joseph stalin, because, while he is at first a common farm pig, he eventually gets rid of snowball, another pig which is his rival for power and then takes advantage of the animals' uprising against their masters to eventually become the tyrannical "president" of animal farm, which he later turns into a dictatorship. (just like joseph stalin did during the russian revolution)
snowball best represents leon trotsky because he is seen as the new life in the farm after old major's death. also, snowball was an eloquent speaker (a similarity they share) but does not get along with napoleon and is soon banished from the farm.
i just finished reading the book for school, so it's fresh in my mind. hope this helped, and please consider giving more points.
- cherry :)