Final answer:
In the sentence 'My little brother won the race', 'brother' and 'race' are the nouns, 'won' is the verb, and there are no adjectives.
Step-by-step explanation:
In the sentence "My little brother won the race", The nouns are 'brother' and 'race'. They are the words that represent a person (brother) and a thing (race). The verbs are 'won'. Verbs denote actions, and in this instance, 'won' is the action performed by the subject 'brother'. There are no adjectives in this sentence. Adjectives are words that describe or modify other words, typically nouns or pronouns.
Learn more about Identifying Parts of Speech