Read the sentence in English and choose which option restates the same sentence but stating what the subject is going to do in the near future I am going to swim in the sea.

A) Yo voy a nadar en el mar
B) Yo nado en el mar
C) Yo ir a nadar en el mar
D) Yo nadar en el mar

c. its asking which of the words need an accent mark. its spelled biografía

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