A verb which ends with (ing) and acts as a noun is called:

This question tests knowledge of verb forms and their functions in grammar. A verb form ending in "-ing" can serve different roles.

• Correct Option (B): A Gerund is a verb form that ends in "-ing" and functions as a noun in a sentence (e.g., "Swimming is good for you").
• Distractor (A): An Adjective describes a noun or pronoun. While some "-ing" words can be adjectives (e.g., "a running man"), they don't act as nouns.
• Distractor (C): An Infinitive is the base form of a verb, usually preceded by "to" (e.g., "to run"), and does not end in "-ing" when acting as a noun.
• Distractor (D): A Participle is a verb form used as an adjective or to form verb tenses. Present participles end in "-ing" but function as adjectives or part of a verb phrase, not as nouns.