The correct statement that applies to the energy pyramid, the biomass pyramid, and the numbers pyramid is:
a Producers are at the bottom level of all three pyramids.
In all three types of pyramids, producers (such as plants and phytoplankton) are located at the base, as they create energy through photosynthesis and serve as the primary source of energy for consumers in the ecosystem. Consumers are situated above producers in the energy and biomass pyramids, while the numbers pyramid represents the count of individual organisms, which can vary in structure depending on the specific ecosystem.