Respuesta :
Running is my favorite thing to do. Here, Running is being used as: include option D: a gerund working as a noun.
What is the term gerund about?
A gerund is a noun that comes in the family of a verb. U add -ing in the words such as:Learning, Playing, Fighting and Punching.
Gerunds are used as nouns. Like infinitives, they can be a subject, an object, a predicate noun, or an appositive. Unlike infinitives; gerunds can also be the object of a preposition.
Therefore, correct option is D.
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