Which word type is used to modify a verb or adjective?

The word type that modifies a verb or an adjective is known as an adverb. Adverbs serve the purpose of providing additional information about how, when, where, or to what extent an action is performed, or they can modify adjectives by indicating the degree or manner of the quality described. For instance, in the sentence "She runs quickly," the adverb "quickly" modifies the verb "runs," telling us more about how she runs. Similarly, in "The very tall building," the adverb "very" modifies the adjective "tall," enhancing the description of the building.

The other options do not fulfill this function: conjunctions are used to connect clauses or sentences; prepositions establish relationships between nouns or pronouns and other words in a sentence; and nouns are used to name people, places, things, or ideas. Each of these has distinct roles in sentence structure but does not modify verbs or adjectives like adverbs do.