Answer:
In the sentence "I would like to know the answer," the phrase "to know the answer" is an infinitive phrase. An infinitive is a verb form that is typically preceded by the word "to" and functions as a noun, adjective, or adverb in a sentence. Infinitive phrases consist of an infinitive verb and any objects or modifiers that go with it.
In this case, the infinitive "to know" is functioning as the direct object of the verb "like," and the noun phrase "the answer" is the object of the infinitive "to know." The entire phrase "to know the answer" functions as the direct object of the verb "like."
