What detail? I don’t see one.
Answer:
The correct sentence is:
Before 8 a.m., traffic is light; however, at 5 p.m., Fred always wishes that he drove a bulldozer to push other cars out of his way.
1. light;
2. No change is necessary
Explanation:
In the sentence above, a semicolon is used after the word light, to denote that two contrasting clauses are to be beside each other in the same sentence.
The use of however which is a conjunctive adverb and a comma after it is fine and should not be changed because it is used to link together two independent clauses.
Answer:
Let's see what's there huh?
Explanation:
It is in the introduction and then restated in the conclusion. Each supporting detail is then referred to in each of the body paragraphs one by one. The question is worded very oddly in my opinion so I would say introduction because it fits that answer best, but it could technically be all of them.