The amount of energy at each level of the food web
The answer is: right.
An energy pyramid is a graph showing the amount of energy available at each level of the food web.
It starts with the producers (plants) at the base, who harvest energy from the sun.
This energy is then transferred up the food chain from one organism to another as each organism consumes energy from the organism below it.
The consumers at the top of the pyramid have the least amount of energy available, since all energy is passed through the food chain.
The energy pyramid helps show how energy is transferred and used within an ecosystem.