I believe another term for Natural Selection, based off of the answers provided, I would say C, Survival of the Fittest.
Calcium
Calcium helps build and maintain bones.
If the pacific ocean was rimmed by the ring of fire we can conclude that the plate boundaries are constantly moving
Exposure to environmental tobacco smoke causes approximately 45 to 46,000 non smokers to die of heat diseases annually. Smoking harms the cardiovascular system in many ways which include; damaging the lining of arteries, reduces HDL, good choresterol, Raises LML, bad cholesterol, increases blood pressure and heart rate, it also causes the platelets to stick together in the blood stream and speeds the development of fatty deposits in the arteries among other risk factors.
