Which part of speech indicates location?

The correct answer is preposition, as prepositions are specifically designed to indicate relationships between nouns or pronouns and other words in a sentence, including spatial relationships or locations. For example, words like "in," "on," "at," "under," and "between" clarify where something is situated in relation to something else.

In contrast, pronouns serve as substitutes for nouns, but they do not indicate location. Adverbs modify verbs, adjectives, or other adverbs and can describe how an action is performed, but they are not primarily focused on location. Conjunctions connect words, phrases, or clauses, but they do not convey location. Therefore, the role of prepositions is unique in their ability to anchor ideas in physical space, making them the part of speech that indicates location.