The Tone of the Poem is the Author's attitude revealed through words.
Answer:
The leadership on the farm is a dictatorship. The pigs have all the power and choose who lives and dies. They also much like the Russian government take everything for themselves and make the people of lesser status do all of the work.
Seclude means to keep a somebody away from other human beings.
While, segregate means to separate. For example, in US History, African Americans were segregated from white Americans.
So seclude is used for one person, while segregate is used for groups of people or things.