Answer:

Explanation:
Joe, the coach, is sick.
Appositive Comma: A comma that is placed when a noun is right next to another descriptive noun.
<u><em>Joe</em></u> is the noun. He is the person, out of the person, place, thing and idea.
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<u><em>The coach </em></u>is also a noun that is describing the coach.
The comma has been placed to separate the two nouns. The coach helps describe Joe.
He was so scared probably because he didn't trust them.
Explanation:
What sentence are you talking about? We can't see.
I have no idea, but the same thing is happening to me. But if ppl reply quickly maybe they won’t be able to delete them.