Answer:
We need to write at least 3 things that you can do to preserve the natural environment.
I will write to them in English and then provide a Spanish version of them.
1) Recycling
Reciclar.
2) Control the water consumption, try to not waste it.
Controlar el consumo de agua, tratar de no desperdiciarla.
3) Throw some high contaminant things, like batteries, in the designated places for their treatment.
Tirar cosas muy contaminantes, como baterias, en lugar designados para su tratamiento
11.D
12.A
13.B
14.B
15.A
16.B
17.D
18.D
19.A
20.A
21.B
Hope this helps:))
