The concept of energy balance is based on the fundamental thermodynamic principle that energy cannot be destroyed, and can only be gained, lost, or stored by an organism. Energy balance is defined as the state achieved when the energy intake equals energy expenditure.
<em>*Source for explanation: touch endocrinology*</em>
Explanation: In group therapies, several people who share a common problem all meet regularly with a therapist to help themselves and one another; the therapist acts as a facilitator.
