Select the correct answer Which word best completes this sentence? Las son aves que viven en las regiones costeras. A. tortugas B. palmeras C. ballenas D. gaviotas

The answer to this question would be  D, gaviotas, because the meaning of gaviotas is "seagull, which is a kind of bird, Las son aves que viven en las regiones costeras, in English would be "The are birds that live in coastal regions"

so with the answer, and in English it would be "The seagulls are birds that live in coastal regions"

and in Spanish it would be " Las gaviotas son aves que viven en las regiones costeras".

Hopefully this is helpful and correct. (:

Con suerte, esto es útil y correcto. (:

corras is the only one that is informal but doesn't follow the suffix rule. correr is the verb. corre is the formal verb form. corra would be used as the formal is corre ended with an a.

your best bet would be corras, it's the only one that is informal but is still wrong