How is percentage of energy from a energy pyramid that is not transferred to the next higher level used?

The percentage of energy that is not transferred to the next higher level in an energy pyramid, typically around 90%, is primarily lost as heat through metabolic processes, respiration, and other biological functions. This energy is also utilized for growth, reproduction, and maintenance of the organism's body. Additionally, it supports the organisms at lower trophic levels, contributing to ecosystem dynamics and nutrient cycling. Ultimately, this energy loss shapes the structure and functioning of the entire ecosystem.