Many people living in the gulf coastal plains region of texas have worked in which of the following industries?

a.
oil

b.
fishing

c.
agriculture

d.
all of the above

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.

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."

isb

explanation:

ahw

answer; ///he could not explain why the continents drifted;