Could someone me selected the appropriate forms for these verbs

When traveling in the spanish-speaking countries, it's very important to be able to understand directions in spanish, so that you can find out how to get from place to place. but what happens if you need to give a friend directions? would you be prepared? in this project you'll practice giving directions to places in panama city.

No debemos el medio ambiente. a. contaminar b. preservar c. desechar d. cumplir

Como es posible que en la misma latitud cerca de la linea ecuatorial haya picos cubiertos de nieve y selvas tropicales