he is risking his life and physical well-being.
Doodle' Brother was ashamed of Doodle through out the entire book so when Doodle couldn't finish the goal that his brother set for him his Brother was so ashamed that like a child ran away from Doodle. He did not intend to kill Doodle though
Doodle's brother cried at Doodle's death and covered him with his body to protect him from the rain. He cried because he realized that he had pushed Doodle to hard for his (Brother's) own selfish reasons. The irony is that Brother's actions toward Doodle when Doodle died are just like Doodle's reaction toward the scarlet ibis when the scarlet ibis died.
Doodle's brother's name is never mentioned. When Doodle addresses him, he simply calls him "Brother."
the brother tried to change doodle cause he wanted him to be normal
Doodle is trying to be normal to please his older brother who wants a brother with whom he can run, swim and play, not an invalid like Doodle. The brother is also embarrassed to have an invalid brother. The brother decides to teach Doodle to be normal, because Brother tells Doodle he shouldn't be different from everyone else in school. When Doodle asks if it's important, Brother tells him it is. Doodle is afraid of Brother leaving him behind so he willingly agrees to learn these things even though no one thinks he can.
Brother became remorseful that he had pushed Doodle far beyond his physical limits to the point where Doodle dies. Brother probably realized that he pushed Doodle too far out of his own selfish reasons rather than just a desire to help him. He was also sad that he was angry at Doodle for not meeting the goals of physical improvement they had set and that is why Brother ran away forcing Doodle to over exert himself trying to keep pace. Brother cries over what has happened and at last protects Doodle by covering him from the falling rain.
The little brother is Doodle.
Brother forces Doodle to touch the small coffin that his father had made right after Doodle was born when he was not expected to live. Doodle did live and the coffin was stored away in a loft. Brother took Doodle to the loft and made him touch it as if to impress upon Doodle that he was near death and probably still is.
When Doodle is born, Brother is disappointed that Doodle has physical handicaps and he worries the he may have mental ones as well. His wounded pride in having such a brother compels him to think about smothering Doodle with a pillow. Related to that, when Doodle smiles at Brother, Brother realizes Doodle is not mentally handicapped after all. Now that some of Brother's embarrassment has been assuaged, he decides not to smother Doodle. Brothers decision not to act is still an action. Brother begins teaching Doodle how to stand up and be normal like everyone else. He does this not out of altruistic reasons, but out of selfish reasons so as not to be embarrassed in front of his friends at school for having a disabled brother. When he shows the family that he has taught Doodle to stand up, the family is happy, but Brother cries, because he realizes he taught Doodle to stand up more to prevent his own embarrassment than to help Doodle. At the end, when Brother finds Doodle dead, he cries now realizing it was his selfish prideful reasons that caused Doodle to over exert himself to death.
Doodle fails to make the physical improvement Brother had set for him to achieve before the beginning of the new school year. Brother wanted to go to school with a brother who was no longer an invalid. When this became impossible Brother was disappointed and angry.
The climax is when Brother picks up Doodle's drooping head only to have Doodle's limp body fall backwards and Brother realizes that Doodle has died most likely because of all the physical exertions he put Doodle through because he was too proud to have an invalid for a brother.
When the narrator teaches Doodle to walk, the narrator believes that a. it will free him from Doodle b. he can teach Doodle to do other things, too c. his parents will appreciate him more d. Doodle will abandon him