Consumers at the lower level require more energy than the top-level consumers. Consumers at the top level require more energy than the lower-level consumers. The consumers are feeding on larger organisms that have less energy. The consumers are feeding on smaller organisms that have less energy.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In a food pyramid, which best explains why the number of organisms decreases from one trophic level to the next?
Possibilities:
- Consumers at the lower level require more energy than the top-level consumers.
- Consumers at the top level require more energy than the lower-level consumers.
- The consumers are feeding on larger organisms that have less energy.
- The consumers are feeding on smaller organisms that have less energy.

Consumers at the top level require more energy than the lower-level consumers.