Question

Emily began rebuilding the doll house her brother had demolished.
O adjective
O verb

Answer 1

it is an adverb

because they are using rebuilding to express the doll house by saying it was demolished by Emily's brother

Answer 2

Answer: I think it is a adverb..

Step-by-step explanation:

Because it says "rebuilding the doll house her brother has demolished", a adverb is a adjective that is explaining a verb.

Adjective: Explaining a word, sentence, paragraph, story, etc.
Verb: an action.
Emily rebuilded the doll house and there was explaining at the end, so it is a adverb.