Apopulation of deer mice with light-colored fur lives in sand hills, nebraska.
the ground in sand hills is light colored where glaciers have deposited sand
on top of dark soil. in contrast, areas outside sand hills have dark soil and
dark-furred mice. how did the mice in sand hills come to have light-colored
fur?

depends on the age of the teen, many believe by the age of 16 a person should know the strong difference between right and wrong along with the difference between risky and immediate death. swimming with sharks might be dangerous but swimming with sharks while bloody meat is attached to you is just insane. even more if you have no idea what you're doing. however, no matter the age, as long as the person is skilled enough and has the mental and physical capacity to control their actions doing whatever sport they put their mind to is all that matters.

thomas jefferson is the answer

d. dr. francis collins