Your wording is a bit confusing, but I will do my best.
In the energy pyramid/food chain, there are around seven trophic levels; Apex predators, teritiary consumers, secondary consumers, primary consumers, producers, and decomposers in a separate bottom level. In your case, you only need the apex predator, primary consumer, producer, and decomposer.
Lion - Apex predator
Gazelle - Primary consumer
Grass - Producer
Bacteria - Decomposer
