I think it's nadar because "va al mar" means he is going to the sea. Therefore, he would be going to swim.
Necesito una habitacion, porfavor.
1. estoy
2. está
3. son
4. es
5. es
6. está
7. es
8. es
9. está
10. son
11. somos
12. estamos
13. es
14. es
15. estamos
16. está
17. estar
The answer is A because the tortilla itself is made from flour, to be exact corn flour.