d. Two hairs from the same head may not have the same morphological characteristics.
Explanation:
The statement in option a is not correct as we can't always determine the racial origin of hair.
The statement in option b is not correct as it is not possible to do through trace elemental composition.
The statement in option c is not correct as hair is not examined to determine the sex because the Shettles Method is uses to determine the sex of a baby.
The statement d is correct as the hair have different structural features like length which makes its morphological characteristics.
Stone Mountain was formed during the formation of the Blue Ridge Mountains around 300-350 million years ago and is considered part of the Appalachian Mountains.