What’s the answer to this question

If one writes logically, he will prove his point. is this sentence correct or contains an unwarranted shift in person?

Based on the book, "the boy in the striped pajamas."describe how these circumstances would affect a person’s identity development (crisis, commitment, diffusion, foreclosure, moratorium, achievement.)

Which sentence uses all its nominative case pronouns correctly? a we live on the same street b them and rachel are good skaters. c the redskins fans in the family are fred and me d have joanne and him played tennis together before?