This is always in the form of "to" + a verb-like word. This verbal unit in a sentence actually acts as a noun, adjective, or adverb, rather than a verb.

Respuesta :

The answer is DEFINITELY an Infinitive.

In English, an infinitive is "to" + a verb.

To walk
To live
To play
To love
To learn

I hope this helps you and have a great day!! :)