Final answer:
The underlined conjugation in the sentence 'Los hombres venden carros' is grammatically correct.
Step-by-step explanation:
The underlined conjugation in the sentence Los hombres venden carros is grammatically correct. The subject of the sentence is los hombres which means 'the men' in English. The conjugated verb venden matches the subject and is the correct form for 'they sell' in Spanish.
Learn more about Spanish verb conjugation