Which word expresses action, a state of being or feeling, or a relation between two things?

The correct choice emphasizes the role of the verb in a sentence. A verb is a word that indicates an action (such as "run" or "jump"), a state of being (like "is" or "are"), or a relation between two entities (for example, "connects" in "The bridge connects the two cities"). Verbs are essential components of predicate structures in sentences, conveying what the subject does, how it exists, or how it relates to other elements.

In contrast, nouns typically name people, places, things, or ideas; adjectives describe or modify nouns; and adverbs modify verbs, adjectives, or other adverbs. Each of these parts of speech serves a unique function within a sentence, making the verb particularly central in conveying the essence of the action or state being discussed.