La biodiversidad se refiere a :

La biodiversidad se refiere a la variedad de especies vivas en la Tierra, incluidas plantas, animales, bacterias y hongos.

Explanation:

hope this helps

the answer is c. estudió

explanation:

to translate: last year a group from my school went to cuba and studied the history of the island. you would use preterite form because it was one time and they use fue in the sentence.

if your asking for what that says, it is

which of these words is an

but i don't know what sentence your asking for the adjective from.