Qué animal tiene los pulmones más eficientes a. anfibios b. insectos c. mamíferos

when you are going to explain a procedure,   the first thing to do is to name the parts or the apparatus you are going to describe in terms of how it or they function. also it is important to know who is going to operate it and the abilities this man/woman requires to manage it.

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

hi

choose the best informal 'tú' translation of the following sentence = run

it's an imperative form ===> corre (tú)

correr (présent)

corro

corres

corre

corremos

corréis

corren

none of thes are

imperative tense

corre (tú) > correct

corra (él/ella/ud)

corramos (nosotros)

corred (vosotros)

corran (ellos/ellas/uds)

hope this will : )