Why is it more necessary for adolescents to take bath regularly (at least onece everyday)

Why do adolescents start taking drugs? How can this be avoided?

Which of the following are necessary for evolution by natural selection to take place? (i) Offspring resemble their parents more than other individuals in the population. (ii) Differences among individuals exist and lead to different numbers of successful offspring being produced. (iii) Individuals adjust their development depending on the enviorment (iv) Every individual possess enormous fertillity.