Concept:
Parts of speech classify words based on their function in a sentence. An adverb modifies a verb, adjective, or another adverb and often describes how, when, where, or to what extent something happens.
Step 1: Identify the underlined word.
The word given is "fluently".
Step 2: Understand its role in the sentence.
"Fluently" describes how she speaks.
Step 3: Determine the part of speech.
Since it modifies the verb "speaks" by telling how the action is performed, it is an adverb.