Question

Which word in the sentence is an adverb? The hungry squirrels climbed the tree and chattered loudly.

Answer 1

  A word that describes a verb or an adjective is called a ADVERB 
The hungry squirrels climbed the tree and chattered loudly. 
Loudly is the adverb 
Many adverbs end in “ly”. 

Answer 2

The adverb is "loudly" because it describes how the squirrels did what they did (chattered.)