The biologist paused briefly before beginning her presentation on butterfly behavior. what is the adverb

An adverb is a word or a group of words that modifies an adjective, a verb or even an adverb. It generally answers the questions when? how? where? how much? and at what extent? Typically, it is easy to spot an adverb in the sentence because it ends in a suffix - ly. In the given sentence above, the adverb is the word "briefly" which modifies the verb "paused".