Solution

In the ecosystem, there is a continuous and unidirectional flow of energy. The energy from the sun through the various energy levels finally reaches the tertiary consumers. These various energy levels are joined by a food chain. Many food chains overlap and form a food web. loss of the various energy levels. Trapped energy is fixed in the form of complex organic compounds and is used by herbivorous and carnivorous animals. But the energy does not terminate or end here. When the organism dies, then the dead body gets mixed with the soil. Indirectly it can be said that the complex energy-rich compounds from the dead body are now utilized by decomposers, scavengers, and then ultimately energy is released back into nature after decomposition. Thus, we see at every level, organisms make use of energy, and as a result of the use of energy when life activity occurs then energy is lost, and therefore, the supply of energy is continuously required from the sun.