Which diagram shows the number of organisms at each trophic level?

• A. Qualitative study
• B. Pyramid of numbers
• C. Producer
• D. Predation

Answer: (B)

In ecology, you can visualize how many individuals occupy each step of the food chain with a pyramid of numbers. This diagram specifically shows the count of organisms at every trophic level—from producers up to top predators. It highlights how the number of individuals typically decreases at higher levels because only a portion of the energy available at one level is passed to the next, so fewer organisms can be supported higher up.

The other options don’t fit as diagrams of counts: a qualitative study describes data without numbers, a producer refers to the organisms at the base that make their own food, and predation is about feeding relationships rather than a diagram.