Question

find the relative clause. if it is nonrestrictive, set it off with commas. if it is restrictive, submit the text without making any changes.

caleb steered his rowboat quietly past the fishing boats and went unnoticed by everyone, except for the man whose fishing line became hopelessly tangled around calebs oar.

Explanation:

A relative clause starts with a relative pronoun (like "whose" here) and modifies a noun. The clause "whose fishing line became hopelessly tangled around Caleb's oar" modifies "the man". It's restrictive because it identifies which man (the one with the tangled line), so no commas are added.

Answer:

whose fishing line became hopelessly tangled around Caleb's oar