Look at the thesaurus entry that follows this sentence. Which word is the best replacement for the word "stimulating"? Helen volunteers at the day care center because the constant stimulating sounds and actions distract her from her worries. stimulating (adjective) exciting synonyms: challenging, hectic, interesting, thrilling
Stimulating is another word for restless, and what is a synonym for restless? It is hectic. Therefore the answer is hectic. If it wasn't hectic, then it is thrilling.
