Which word in the following sentence is modified by an adverb?

the curious puppy wagged its tail anxiously.

The word modified by an adverb is wagged.

Explanation:

First of all, adverbs are words that explain the way an action is performed by providing more information about it. They define the manner, place, time, frequency, degree, level, etc. So, in other words, they provide deeper information about how the verb is performed. In our example, our verb is wagged and even though it is followed by its tail. The word modifying the grade wagged is performed is: anxiously.

very interesting story but where is the question what is actually a question i don't understand