Young Sophie has been troubled by frightening nightmares lately. The part of her brain that registers her fear is the ______

Piaget's second stage of cognitive development, which extends from about two to about seven years of age, is:

A) concrete operational. B) formal operational. C) preoperational. D) sensorimotor.

A failure or deficit in recognizing objects __________

a. aphasia b. amnesia c. agnosia d. alexia