Answer:
Opportunity cost is when you have a choice between a number of things. The thing/things you didn't choose are the opportunity cost, if that makes any sense.
Explanation:
I learned this in fith grade science
Maybe being scared of things he never knew before ?
D. You want it to be eye catching to the audience, but you also want it to be relevant to the subject you're talking about. A long title may bore the audience.
The purpose of a descriptive essay is to describe a person, place, or thing in such vivid detail that the reader can easily form a precise mental picture of what is being written.
So A is the answer hope this helps and let me know if it's right!