Present your logics. the "Garden of the World" ? The countries located
the wine industries - How and why it became possible​

do all equestions have to be answered

no because it could make the world a terrible place to live in.

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."