A researcher who found it most useful to think of drug withdrawal as enhancing the rewarding value of a drug would likely be most in favor of which drug addiction model?

The best example of the symbolic play of a 12-month-old would be which of the following?

A) Safi pretends to row a boat using a mop and a broom as oars. B) Emily climbs into her parents' bed and sings. C) Marcus uses toy dishes to pretend he is eating. D) Yuki puts on her mothers' shoes and carries her diaper bag to pretend she is going to work.

__________ may heighten the effects of a high-fat diet

A) Sex hormones B) Over-the-counter medications C) Free radicals D) Low body weight