Como estas is for friends and/or family. Como eres is more formal for work and so on.
I think the sentence is grammatically correct when written as "Los peces no dormen."
"Los peces no dormen." means "Fish do not sleep." which in my opinion is grammatically correct.
Answer:
La
Explanation:
'Mochila' is a feminine word, so the correct article is 'la.'
Answer:
hay
Explanation:
hay is present tense
haya is present subjunctive.
