The video discusses four potential models of how the expansion of the universe changes with time. Drag the correct model description from the left-hand column to the appropriate blank in the sentences in the right-hand column.

what are the statements

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."

a would be the answer