Solution:Concept: A food chain is graphically represented by an ecological pyramid, which shows the interactions between various creatures and the trophic levels that they occupy in accordance with their eating preferences.
The producers are at the bottom of a conventional ecological pyramid, which is then followed by the primary, secondary, tertiary, and apex predators. When there are many producers in an environment, the biomass pyramid will be upright; however, when there are few producers, the biomass pyramid is said to be inverted.
Biomass is often arranged in an inverted pyramid shape in seas or aquatic ecosystems where phytoplanktons are the primary producers. Despite being relatively numerous, phytoplanktons have less biomass than zooplanktons.
Hence, the appropriate response choice (2) .