Why are media potentially so effective? A. People spend more than half of their time interacting with media.
B. Over the last 10 years, the number of people over the age of 50
who use the Internet has increased.
C. Search engines are growing in number, helping more and more
people find what they're looking for online.
D. All of the above

i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

hope this

i am brianly

sorry if this doesn't

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."

quote is the answer your looking for.

answer; one person; monarch;