Phenylketonuria is an inherited disorder. affected individuals have a defective enzyme called phenylalanine hydroxylase. the substance these individuals cannot break down is a(n):

cuz he is really really short, assuming an unorthodox and inherently unlucky configuration of elevator buttons…

explanation:

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.