Which sentence contains an adverb modifying an adjective. The barn cat purred happily the very content cow chewed cud unfortunately, it began to rain slowly, the sleepy pig rolled over

The barn cat purred happily.

The sentence "The barn cat purred happily" contains an adverb (happily) modifying an adjective (purred).

The sentence "The barn cat purred happily" contains an adverb modifying an adjective.

To identify this, we need to first understand what adverbs and adjectives are. An adverb is a word that modifies a verb, adjective, or another adverb, while an adjective is a word that describes or modifies a noun or pronoun.

In the given sentence, "happily" is the adverb and it is modifying the adjective "purred." The word "purred" describes the action of the barn cat, and the adverb "happily" tells us how the cat purred. Specifically, it tells us that the cat purred in a happy manner.

To find the answer, it is important to analyze each sentence and identify the adverbs and adjectives in them. In this case, we find that "happily" is modifying the adjective "purred" in the sentence "The barn cat purred happily."