Final answer:
The correct conjugation is 'trabaja'
Step-by-step explanation:
The correct conjugation of the verb in the sentence is trabaja, which means 'he works' in Spanish. The subject 'él' corresponds to the third-person singular pronoun, so we use the conjugation 'trabaja' to match the subject. It is important to match the verb conjugation with the subject pronoun in order to maintain grammatical agreement.
Learn more about Verb conjugation in Spanish