Question

why does percy say he felt miserable at the start of this chapter? he knew that monsters would forever be after him. after starting to be accepted by his peers, he felt isolated again.

Explanation:

Based on the given options, the first - "He knew that monsters would forever be after him" - is a common reason for a character to feel miserable in a fantasy - themed story. The second option about feeling isolated after being accepted by peers seems less likely to be the initial reason for feeling miserable at the start of a chapter.

Answer:

He knew that monsters would forever be after him.