Identify the infinitive phrase in the sentence below. the goal of the national park service is to conserve natural scenery and wildlife.
a. to conserve natural scenery and wildlife.
c. is to conserve
b. of the national park service
d. the goal

The correct answer is A.

An infinitive phrase is a group of words that uses an infinitive ( to + verb ).

It has the same role of expressing action in a sentence as the verb but it is just a part of a sentence, working as a noun, adjective or adverb.

The most important part of an infinitive phrase is the infinitive. It is the word to + the base form of the verb, for example: to go, to sit, to swim.

The infinitive is usually followed by an object or a modifier, for example: to learn advanced German.

In the phrase to conserve natural scenery and wildlife, the infinitive phrase works like a noun because it answers the question what ?

A. To conserve natural scenery and wildlife.

Explanation: An infinitive phrase is a group of words that uses an infinitive (“to” + verb). An infinitive is a verbal (a word that expresses action); so, an infinitive phrase has the same role of expressing action in a sentence. An infinitive phrase is just a part of a sentence, working like a noun, adjective, or adverb.

Example: I want to eat chicken for dinner.