Answer:
Adverb of manner: gracefully
Explanation:
An adverb is a word that modifies (describes) a verb (“he sings loudly”), an adjective (“very tall”), another adverb (“ended too quickly”), or even a whole sentence (“Fortunately, I had brought an umbrella.”). In this case, gracefully is what would be considered the adverb, as it is describing the manner at which Mia dances. Hope this helped a little bit :)