You work for the drug company novartis and are developing a drug to treat prader-willi syndrome. which region of the brain would be best for your drug to target?

Prader–Willi syndrome (PWS) is a hereditary disorder because of loss of function of specific genes. Starting in childhood the individual converts continually hungry which often goes to obesity and type 2 diabetes.  So the region of the brain would be best target is the hypothalamus. The hormones from the hypothalamus oversee physiologic purposes such as temperature, dehydration, starvation, sleep, attitude, and the discharge of other hormones within the body. 

(A) use a magnet; mixture

Explanation: Iron is strongly attracted to magnets and sand is a mixture.