Answer:
The pronoun "it" is wrong because the word "domes" is plural and "it" is singular. You would replace it with "they".
I think the answer is either
A. Why does Harry seem sad at the end of the passage.
or
D. Where will jack and Harry find work after the professor leaves?
Number 1 is a phrase and number 2 is clause 3 is also a clause and A clause is a group of words that consists of a subject and a verb. ... A phrase is a group of words that does not consist of a subject and a verb.