How does he speaker of the poem describe america as singing

The speaker of the poem announces that he hears "America singing," and then describes the people who make up America—the mechanics, the carpenters, the shoemakers, the mothers, and the seamstresses. He declares that each worker sings "what belongs to him or her," and that they all sing loud and strong as they work.

Explanation:

the correct answer is “opportunity cost”. opportunity cost is what a company misses out because it decided in one option over another one. in this case, the company decided to invest in building a factory so it gave up another possible benefit or profit in order to achieve success with the factory.  

trade-off is not the correct answer since it is a situation in which you accept losing something in return for benefits in other areas.

and finally, consequence is a general term used to accept what it comes when you make a decision. it can be a positive or negative consequence depending if the decision you took was the correct one.