Energy exists in different forms: br Thermal energy, electrical energy, br Magnetic energy, chemical energy, br Wind energy, solar energy and et al. br Bio-energy consists of chemical, br Thermal, electric, magnetic energy. br Bio-energy confines to bodies br And is distinct from their counterparts br That exist outside the living bodies br In that it as a unit cannot exist br Without the living mass in any way, br That it ceases when bodies disintegrate, br And that it transmits through reproduction. br Bio-energy is only expandable.br br Rm.Shanmugam Chettiar.