Determine whether the study depicts an observational study or an experiment. Upper A study is conducted to determine if there is a relationship between height and childhood exposure to measles. Students have their height measured and are asked about childhood exposure to measles. Does the description correspond to an observational study or an experiment?

aristocracy, timocracy, oligarchy, democracy, theocracy and tyranny

explanation:

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."

where is the rest of the question. this isn't making sense. can you upload a picture of the question?

answer; the above statement is (true);