Question: In a food pyramid, which best explains why the number of organisms decreases from one trophic level to the next?

  Options: 
 A. Consumers at the lower level require more energy than the top-level consumers.
 B. Consumers at the top level require more energy than the lower-level consumers.
 C. The consumers are feeding on larger organisms that have less energy.
 D. The consumers are feeding on smaller organisms that have less energy. 
Answer: B