Lifespan quiz in recent years, adopted children (and their adoptive families) are more likely to communicate with the children’s birth family, an arrangement known as a(n):

Open adoption.

Explanation:

This form of adoption, as the exercise describes, involves both families, the biological and adoptive one. They have the choice to communicate with each other, counting with limited information of the others. Even though the adoptive parents are backed by the law and have all legal rights, the biological family could still contact them. And, altough recent in many places,  this method of adoption wasnt rare in Asian countries, such as Japan, or in South Asia, in the Hindu society.

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; higher rate;