Question

How is the infinitive used in the sentence?

Aren't these origami cranes easy to make?









A.
adverb







B.
adjective







C.
noun

Answer 1

Make is the infinitive in the sentence. If you didn't know an Infinitive is an action word. So the word make is used as an adverb.
Hope this helps^.^

Answer 2

The answer is adverb, since the infinitive 'to make' acts as one :)