"Se usa para pensar" means (It is used to think) el cerebro means "brain". "La garganta" means "throat". "La mejilla" means "the cheek". "La cara" means "face". It is A. Hope it helps! ~Pooch ♥
Answer:
Fuera
Fuera means left (gone away...) not left (meaning your left hand or direction...).
Before Antonio had left, his mother had called him.