Answer: C) Adjective.
Explanation: an adjective is a word that describes or modify a noun or a pronoun in a sentence or phrase. In the given sentence, the highlighted word (screaming) is used as an adjective that is modifying the noun "baby." It isn't a verb because it isn't demonstrating an action. It isn't a noun neither because it doesn't denotate anything, and neither it is an adverb because it isn't modifying a verb or another adverb.