The amount of energy decreases as you go up in the food chain.
The answer would most likely be A).
The most direct effect of severing the corpus callosum would be that the cerebral hemispheres could not directly communicate, since the corpus callosum is the set of nerve fibers that unites both cerebral hemispheres, this structure is located in the midline of the brain, situating itself in the interhemispheric fissure and being mostly hidden from external observation when it is partially obscured by the Cortex.
False Primary Producers must form the largest base, because if there is a shortage of them, then there will be only a small amount for all others. This i guess can be called the Doppler's effect
('bit of history in here)
hope this helps