According to the chapter, how many deaths have been directly attributed to the use of marijuana?

A drawing of a gravel road depicts the tiny rocks as becoming smaller and less distinct as one looks "down the lane." This simulation of depth on a two-dimensional sheet of paper is an example of the _______ cue

a. interposition b. texture gradient c. elevation d. shadowing

Which of the following correctly identifies factors in the risk for progressing from alcohol use to alcohol abuse or addiction?

a) impulsivity, low response to alcohol b) impulsivity, high response to alcohol c) genes alone d) environment alone