Question

Question #2dfa2

Answer 1

There are two verbs in the sentence, "hopped" and "sang", both are intransitive verbs.

Explanation:

A transitive verb is a verb that has an object.
An intransitive verb is a verb that doesn't have an object.

Breaking the sentence into two sentences with one verb each, it's easier to see:

"The little bird hopped about."
--The verb is "hopped", the word "about" is an adverb that modifies the verb.

"The little bird sang."
--The verb is "sang".