Which of the following is true concerning sources of water pollution? a. mine wastes and heavy metals become water pollution through storm water runoff. b. biodegradable materials like food, wood, and leaves are not considered pollution. c. petroleum byproducts and fuels end up as pollution principally from oil spills. d. pesticides and herbicides do not commonly become water pollutants.

c. Petroleum byproducts and fuels end up as pollution principally from oil spills.

Explanation:

c. Petroleum byproducts and fuels end up as pollution principally from oil spills is the correct option due to the fact that petroleum byproducts and fuels are the chemical pollutants. These fuels are used to drive water transportation vehicles. These vehicles leave large amount of incomplete or partially combusted fuel in water or fuel may leak out from the vehicle. These fuels contaminate the water and deteriorates it's quality.  

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

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