Answer:
11. las vacas estan comiendo en el campo.
12. I used estar because in this sentence the cows are in a location therefore estar is used here. I used the present tense of to eat to match estar.
13.Estos zapatos que vienen son de China.
14. I used ser because it is talking about the shoes that will always be form china. It is in a permament stae so ser is used here. i used the verb to come because it matches the present tense.
15. las playas de Mexico son bonitas.
Step-by-step explanation:
Sorry for not finishing but I am busy. bye!