What is a short-term benefit of quitting a dependence on drugs? ?

During a formal discussion in his science class, kai will be speaking about the important of exercise. what is the best advice he can follow to be a prepared speaker

Esther works at a large hospital where she plans food service programs she monitors an records information regarding patients diets and intake and is devoloping a new meal plan that addresses several different dietary needs for many types of patients esther enjoys her work as she feelss that she is patients develop healthier habits

How could natural selection best be used to explain the evolution of the white fur of arctic fox