What is a participle?

A participle is indeed a verb form that functions as an adjective. This means that a participle modifies nouns or pronouns within a sentence, providing more information about them. For example, in the sentence "The running water is cold," the word "running" is a participle that describes the noun "water."

Participles can be present (ending in -ing) or past (often ending in -ed or irregular forms), but their primary function remains the same: to modify or give more detail about a noun. This aspect of participles makes option B the correct choice, as it precisely captures their role in sentence structure.