John and Pat's occupation best explains the difference between their skin pigmentation. Since Pat works as a lifeguard, she is more exposed to the sun, which tans her skin. John, on the other hand, works in the theater, where he isn't exposed to sunlight that much, so he is much lighter than his twin, Pat.
Answer:
D. Areas where the Earth's mantle experiences a high amount of stress.
A. It is likely made up of the metals nickel and iron.
Explanation:
Tectonic plates are located in the uppermost area of the Earth's mantle.
The core of the Earth (innermost layer) is made up primarily of nickel and iron.
I hope this helps! :)
Answer:
formed when loose materials become pressed or cemented together of when minerals form from solutions
