'After the first round, the competitors must eat slowly before the next round begins', is the correct form of sentence after adding adjective and adverb.
<h3>What are the uses of an adverb and an adjective?</h3>
An adjective defines the quality or quantity of a noun or a pronoun in the sentence. And the adverb is used to denote the way in which the action takes place in the structure of a sentence.
Hence, the significance of an adverb and an adjective is aforementioned.
Learn more about adverb and adjective here:
brainly.com/question/2557615
#SPJ1