Answer:
The opposing forces in the passage would have to be Turner and Revered. Mainly because of their opposite points of view and their willingness to try new things.
What Turner's conflict with himself at the end of Lizzie Bright and the Buckminster Boy is that he has the urge or likeness of staying in the island because he finds it to his liking though even if he wants to stay, he couldn't, it is because of the people who is with him that does not like the island for the people on the island is someone who they dislike and can't trust. So even if Turner wants it, he couldn't do anything about it.
In Lizzie Bright and the Buckminster Boy, the time period of 1912 contributes to the main conflict in the novel since racism against African Americans by whites was the norm at that time". The setting of novel "Lizzie Bright and the Buckminster Boy" by Gary D. Schmidt is 1912. The story focuses on residents of Malaga Island who were placed in a mental hospital.
The historical period contributes to the story due to the fact that racism against African Americans was totally usual in 1912, and Turner become friend with a black girl, so that the social situation turns complicated.