Not sure if you still need the answer but its number Three, they are the decomposers in many ecosystems
I think A is the youngest layer, because of the new sediments that fell upon the animal.
The deoxygenated blood leave the right ventricle via pulmonary artery to the and is taken to the both right and left lung. That is the deoxygenated blood is taken to alveolar capillaries of the lung . As blood flows through the alveolar capillaries it is oxygenated as carbon dioxide leaves.
Answer:
High surface tension caused by the polar quantities of water.
(C.) The layers of the Earth are uniform in thickness
This is untrue. The mantle is far large than the crust and there are other large size differences.
