Human height tends to follow a normal distribution. for example, 80 percent of men are somewhere between 5 feet 4 inches tall and 6 feet tall, with the largest number of men standing 5 feet 8 inches tall. smaller and taller heights are increasingly rare, as they become more extreme. for instance, less than 0.01% of the adult male population is greater than 7 feet tall or shorter than 3 feet tall.

humans have followed selection with regard to the evolutionary trend for height.

a) artificial
b) disruptive
c) stabilizing
d) directional