What is the rule of 10 within the energy pyramid? in biology the ecosystem

The " Rule of ten " is referring to the decreasing amount of kylo calories as you go down the food chain. The producer has the most energy, around one million, the primary consumer gets 10% of that, the secondary consumer gets 10% of the primary consumer's energy, and so on and so on

there's the proffessional site that will you.

i need