Answer:
Darla set up a studio because she enjoyed painting.
As Aaron was having a midnight snack, he heard a loud noise coming from the basement.
Explanation:
The adverb clause in the first choice is "because she enjoyed painting". This adverb clause explains why she set up a studio. The adverb clause in the second sentence is "As Aaron was having a midnight snack". This adverb clause explains when he heard the loud noise. Adverb clauses tell us when, where, why, how, how much, or under what condition.
