A farmer stops cultivating a large tract of farmland and abandons it. The natural changes taking place soon afterwards, such as the growth of wild grasses and weeds, can be considered: A) Secondary succession because wild grasses and weeds make soil from rocks.
B) Secondary succession because there is already soil present.
C) Primary succession because a new ecosystem develops.
D) Primary succession because the land is not controlled by humans.

hey there!

so, when you eat, your teeth chew and grind food into smaller pieces. this is mechanical digestion. then reactions aided by digestive enzymes break down large food molecules into smaller molecules. this is chemical digestion. the two processes change the food into simpler substances that can be used by the body for raw materials and energy.

hope this

tobey

cuz he's blad

explanation:

not sure if this what   you'r looking for would be percent composition

b. lithosphere, asthenosphere, mesosphere   is the answer most likely