Adolescents who do not receive affection from their parents during childhood are: a. more likely to engage in violent crime as they mature b. more likely to use illicit drugs and be more aggressive as they mature c. more likely to suffer mental impairment as they mature d. more likely to be depressed and suicidal as they mature

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."

answer; colony;