A fossil might preserve Select one:

a.
bones and teeth.

b.
burial grounds.

c.
art work.

d.
sizes and shapes of buildings.

a

Explanation:

fossil preserves old things as shells bones teeth

A. It's obvious because it's legit the only thing people can find underground.

Explanation:

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.