1. La princesa hermosa (dormir) cuando su héroe (entrar) al palacio.​

se duerme entra

Explanation:

la princesa hermosa (duerme or se duerme) cuando su heroe (entra) al palacio

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

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.