Question

Marco: ¿Cómo _______, Luisa? Luisa: Muy bien, gracias. * eres estás

Answer 1

Answer:

estás

Explanation:

From this point of view, Marco is asking a person directly, so he would use estas, instead of any other form of conjugation.

Secondly, eres is used to describe a permanent trait about a person; the way that Luisa is feeling, is only temporary, therefore you should not use Eres.