Answer:
Si, su casa es muy grande
Explanation:
make sure to add the su, you are talking to someone about someone else's house. Not your own.
11. Está tomando
12. le está gritando
13. Estamos invitando
14. Estoy comprendiendo
15. Estás corriendo
c.) esquiar en el agua.
Its not "a" because you can't use a boat for it.
Not "b" either because you can't use a boat for snow.
