Colegio, not sure what options there are but school seems it would fit best.
Answer:
The last one : Fernando might offer to help save a species
Explanation:
If you translate it to English it says "Fernando, I am fighting to protect rhinos from hunting." so obviously Fernando is trying to help save a certain species
Answer:
Chico is masculine because it is refering to a guy/boy.
Answer:
Earth has more inertia than the moon
Explanation:
science
