Hint: The Sun will offer help to a large portion of Earth's biological systems. Plants make substance energy from abiotic factors which incorporate sunlight-based energy. Chemical producing microorganisms creates usable compound energy. The food energy made by the engineers is passed to the shoppers, foragers, and decomposers.
Complete answer: Energy flows through the environment only in one way. Energy is moved from organic entities at one trophic level or energy level to living beings in the other trophic level. Energy flows forward throughout everyday life. The pattern of energy is identified with the progression of energy through various trophic levels in a biological system. The current biological system is kept up by the cycling energy and supplements received from various outside sources. At the essential trophic level, the essential producers utilize sunlight-based energy to make natural material through photosynthesis. The herbivores which are available at the second trophic level utilize the plants as food which gives them energy, A significant amount of this energy is spent for the metabolic elements of these creatures which incorporates, supporting development of tissues, breathing, processing food, keeping up blood flow and internal heat level. The carnivores at the after that trophic level as a rule feed on the herbivores and get energy for their survival also, development. In the event that gigantic hunters are available they still address a higher trophic level and they feed on carnivores to get the energy. Thus, the various plants and creature species are associated with each other through orders. In this way we can reason that the progression of energy in an environment is believed to be unidirectional on the grounds that some energy is missing in type of warmth while moving from one trophic level to next for the support of homeostasis of a creature subsequently each progressive trophic level get a less measure of energy when contrasted with the past trophic level.
Hence, the explanation is valid and the statement is true.
Note: The energy which is left as heat can't be utilized by life forms present in nature. The autotrophic life form can't utilize this warmth energy to play out the cycle of photosynthesis. This is the premise that the progression of energy is unidirectional as it can't stream a regressive way.