Which of the following depicts the numbers of producers, herbivores, and carnivores at each trophic level?

The correct answer is: Pyramid of numbers

A pyramid of numbers shows the number of individual organisms involved at each trophic level in an ecosystem. The pyramids are not necessarily upright. In some ecosystems there can be more primary consumers than producers.
A pyramid of numbers shows the total number of individual organisms at each level in the food chain of an ecosystem. A pyramid of numbers does not always have a regular pyramid shape because it does not take into account the biomass of the organisms.