If a tornado uproots most of the trees in an ecosystem, it could be expected that, due to the loss of the trees, there will be a reduction in -
A. sunlight
B. Oxygen
C. Precipitation
D. Soil

B. Oxygen

Explanation:

Trees release oxygen as a byproduct of photosynthesis, so once the trees are uprooted, they will no longer execute photosynthesis and thus no oxygen would be released by the dead trees.

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.