americans participate in government in many ways, including lobbying, volunteering for campaigns, and protesting, but most do so primarily through

the structure of state governments are determined by. "state constitutins'

under the us constitution, all state governments are.'republics'

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; substantive law;

answer; ( correlation );