Somos: Anita y yo means 'we', Estamos is not a good choice because is for temporary facts, and one is tall and intelligent all the time. Hope it helps
Conoce (3)
she recognizes your parents' home
conocen is plural and monica is only one person so that is false
saben is (they know) again plural and referring to someone other than monica
and sabe is "know" but translated over it does not make sense because it has a different meaning
Answer:
"reglas" es grave porque leva la fuerza en la segunda sílaba y termina en s