The repeal of the trustee’s ban on slavery boosted Georgia economic by

the atm that sounds like it should be the answer

a. the moon was locked into orbit by the earths gravity as it was passing by and capture hypothesis i think

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."