Primarily, why is voter turnout lower in the united states than elsewhere? there are more obstacles and fewer incentives in the united states. u. s. citizens are less educated than citizens of other nations. politics is more complex in the united states than in other nations. the voting procedures are too difficult for voters to understand.

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; (true);