The correct answer is letter A, proteger el medio ambiente.
The correct answer is "tambien"
hope it helped!(.;
First ¿Cuánto Cuesta? means How much in Spanish to answer correctly to that answer you say a number for an example:
Girl : ¿Cuánto Cuesta?
Guy: Tres
you may saw the object you are talking about.
But if you wan to answer as saying in terms like how much you love someone you say todo esto which means this much.