According to the text, in industrialized nations like the U.S. the most typical age at which foods other than milk are introduced into a child's diet is:

Extrasensory knowledge of someone else's thoughts and feelings is called __________

a) telepathy. b) precognition. c) clairvoyance. d) psychometry.

According to Piaget, a 7- to 11-year-old child is in the __________ period

a. preoperational c. formal operational b. conservational d. concrete operational