Homeostasis:The body's natural tendency to maintain internal stability or balance by regulating various physiological processes.
Maslow's Hierarchy of Needs: A theory that arranges fundamental needs into a hierarchical order, with physiological needs at the base (e.g., food, water) and higher-level needs (e.g., self-esteem, self-actualization) being pursued once lower-level needs are met.
Instincts:Innate behavioral patterns that are biologically determined and activated in response to specific stimuli, helping individuals fulfill their fundamental needs.