Answer:
Conocer.
Explanation:
Conocer a la hermana mas joven de tu amigo.
....
Pollution effects humans and animals is B.) MALO
You care for common species is
A.) ES BUENO
You must feed the hens every morning is D.)ES IMPORTANTE
also can you use the definition more than once because the rhino one i think would also be B.) malo
Probably speaking and understanding a language, because being fluent means you can speak it and understand the language very well, at least maybe almost as well as a native speaker can.
It's Yo estoy escuchando música because it is temporary as in ESTAR
LOOK AT THE CONJUGATIONS:
<u>Yo </u><u>estoy</u>
<u>Tu </u><u>estás</u>
<u>Usted </u><u>está</u>
<u>Él </u><u>está</u>
<u>Ella </u><u>está</u>
<u>Nosotros </u><u>estamos</u>
<u>Ustedes </u><u>están</u>
<u>Ellos</u><u> </u><u>están</u>
<u>Ellas </u><u>están</u>