Question

highlight the word that replaces a noun.
noun/pronoun verb article adjective preposition adverb conjunction
carlos dog has been missing for three days, and
theres no telling where he might be.

Explanation:

A word that replaces a noun is a pronoun. In the given sentence, "he" takes the place of the noun phrase "Carlos' dog", acting as a personal pronoun to avoid repetition.

Answer:

The word is "he"