In the strange situation test, a 15-month-old child is upset and anxious when her mother leaves the room. when her mother returns, she cannot be comforted and shows anger, but also a desire for contact with her mother. the child is most likely to be categorized

Anxious-ambivalent/resistant

Explanation:

Children categorized as anxious-ambivalent or resistant are showing their anxiety even before they are separated from their mother.

This anxiety is higher when the mother returns. It is a way of showing dissatisfaction upon mother’s leaving or showing signs of helplessness.

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."