Biological energy refers to the energy produced and utilized by living organisms to perform various functions essential for survival. This energy primarily comes from the food organisms consume, which is broken down through processes like cellular respiration. During this process, energy stored in chemical bonds is released and converted into a usable form, such as ATP (adenosine triphosphate). In plants, biological energy is generated through photosynthesis, where sunlight is captured and converted into chemical energy. This process allows plants to produce glucose, which serves as a vital energy source for themselves and other organisms in the food chain. Overall, biological energy is crucial for growth, reproduction, and maintaining life processes.