Acharacter who changes during the course of a story is called a character.

A character who changes during the course of a story is called a dynamic character.

Explanation:

Unlike static characters -those who remain the same from the beginnning to the end of the story and suffer no change,- dynamic characters change throughout the story.

Usually, these changes are the result of what the character learnt from experiences and conflicts he had gone through, as well as from the mistakes and experiences of other characters.

i think it's either 'to expose the corruption of the communists in russia', or 'to criticize animal brutality by communists in russia.'  

hope this ! : )

explanation: use this website and look at the examples to form your own poem : )