"The principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top."
Oldest to youngest: Layer B, Layer C, Layer A
The oldest is always at the bottom, the youngest layer is at the top
c<span>: The interdependence of body systems is essential because all systems work together to maintain homeostasis.</span>
The answer to this is the remains and waste products of plants, animals and other living things organisms.
Lactose because it is a sugar made up of galactose and glucose.
