After the party, tell a friend who was in charge of each task. Use direct-object pronouns in your answers.

¿Quién compró los mariscos? Rosa

¿Quién preparó la ensalada? Mirta y Lidia

¿Quién limpió el apartamento después de la fiesta? La profe

I see no effort on your part? First of all do you know what the direct-object pronouns look like:

me, te, lo, la, nos, os, los, las
(me, you-familiar-singular, it or him, it or her, us, you-all-familiar-plural, them (male & female mixed or all male) and them (only females)

Rosa los compró.

Mirta 7 Lidia la preparó.

La profe lo limpió después de la fiesta.

Sra

your second answer is wrong.

To determine who was in charge of each task after the party, you can use the direct-object pronouns in your answers.

1. ¿Quién compró los mariscos? (Who bought the seafood?) - The answer is "Rosa".
To answer using a direct-object pronoun, you would say: "Rosa los compró" (She bought them).

2. ¿Quién preparó la ensalada? (Who prepared the salad?) - The answer is "Mirta y Lidia".
To answer using direct-object pronouns, you would say: "Mirta y Lidia la prepararon" (They prepared it).

3. ¿Quién limpió el apartamento después de la fiesta? (Who cleaned the apartment after the party?) - The answer is "La profe".
To answer using a direct-object pronoun, you would say: "La profe lo limpió" (She cleaned it).