I think it's nadar because "va al mar" means he is going to the sea. Therefore, he would be going to swim.
Estadounidense is correct
Answer: Mariana te cayó porque no vio la escalera
Explanation:
The situation: The air pollution is so bad that the city council is thinking of banning the use of cars in the city on alternate days, depending on the last number on the license plate of the car (even numbers on Mondays, Wednesdays and Friday, odd numbers on Tuesdays, Thursdays and Saturdays)
What should state officials do?
What should local officials do?
What should local citizens have done to maintain and improve the condition of the places?