<span>A . The United States entered World War II. is the answer</span>
Answer: A large amount of energy is lost at each level, so there has to be a limit on the number of trophic levels.
Explanation:
1) You choose which college to go to: each college you don't choose is an opportunity cost
2) you choose which language to learn. You can't learn them all. If you decide to learn Chinese, you might be missing out on Spanish
3)Where do you want to do your exchange? if You choose one place, you're missing out all the other opportunities.
Answer:
Leather goods, clothing, furniture, and tools
Explanation:
edu 2020
