Explain the use and purpose of incentives in Economics.

See explanation

Explanation:

Economic incentives simply refers to the things that motivates us which then makes us act in a certain way. Economic incentives has to do with the motivation that's required for one to behave in a particular way.

Fur example, one may be motivated to work due to the wages or the salaries that'll be earned. They're typically financial motivations.

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."