Why are rivers less productive than swamps? A. A swamp gets very little sunlight.
B. The water flow in rivers is too high.
C. A river is much smaller than a swamp.
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D. A swamp has very stagnant water.

The correct answer will be B

answer: i say it foxes

explanation:

you need to give us the answer options to for me to offical decide.

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.