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.
Answer:
You Will say vale when you agree in spain
Se puede nadar en este lago.
It is an impersonal sentence because it has no subject. This case is used "<u>se</u>", it is when we want to talk about the subject.
<h3><em><u>MissSpanish</u></em></h3>