Asmall country whose county, capital, and adjective are the same in europe is called?

A small country whose county, capital and adjective are the same in Europe is called a coincidence. There are some examples of this in Europe, like the Vatican City, Monaco, Luxembourg, Andorra and San Marino. These country capitals serve as the heart of political and economical activity, as the population is usually very small outside the capitals.

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."