Final answer:
To replace the direct object in the sentence, you would use the pronoun 'La.'
Step-by-step explanation:
To replace the direct object in the sentence above, you would use the pronoun 'La.' In this sentence, 'las responsabilidades' (the responsibilities) is the direct object. So, instead of saying 'Manuel delega las responsabilidades a los voluntarios en el hogar de ancianos,' you can say 'Manuel las delega a los voluntarios en el hogar de ancianos.' Here, 'las' is the direct object pronoun that replaces 'responsabilidades' (the responsibilities).
Learn more about Direct object pronoun in Spanish