Question

¿Cómo te _____ con tu familia en Ecuador?

sabes

comunicas

comunican

sirves

Answer 1

comunicas, it means communicate in spanish. However, it's not comunican because that means communicated and it is not past tense.

Answer 2

It's comunicas because the question is in the tu form.

You don't serve your family, or know them (because you already do).