Which of the following best explains the natural cause of a decrease in biomass as succession peaks in a climax community? select one:
a. once a climax community is reached, there are no nutrients left in the ecosystem to support the growth of plants.
b. the canopy of forests prevents sufficient light from reaching the forest floor, thereby limiting primary productivity.
c. humans usually cut down old growth forests.
d. the presence of large animals such as elk or wolves prevents the development of young animals.

This verified answer is incorrect, the actual answer here is "B" and here is why:

A climax community refers to a big a stable community, so there would have to be enough nutrients being produced and used by plants for it to be stable in the first place.

The question next says " which one (explains) the (best) the natural cause, and humans aren't natural.

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.

b exhibiting favoritism toward the kikuyu people.