Question

1. ¿carlos les describe la tarea a ana y a ti?

sí, carlos describe la tarea.
sí, carlos describe la tarea.

Explanation:

Identify the indirect object in the question

The question is: "¿Carlos les describe la tarea a Ana y a ti?"
The indirect object is "a Ana y a ti" (to Ana and to you), which is represented by the plural indirect object pronoun "les".

Determine the corresponding pronoun for the response

When answering a question addressed to "Ana and you" (you plural / "ustedes"), the response must be from the perspective of "us" ("nosotros").
The indirect object pronoun for "nosotros" is "nos".

Formulate the complete sentence

The verb "describe" remains in the third-person singular form because "Carlos" is still the subject.
The pronoun "nos" must be placed directly before the conjugated verb "describe".
Therefore, the correct sentence is: "Sí, Carlos nos describe la tarea."

Answer:

¿Carlos les describe la tarea a Ana y a ti?
Sí, Carlos <blank>nos</blank> describe la tarea.