The term for the process by which organisms maintain a stable internal environment is homeostasis. This involves various physiological processes that regulate factors such as temperature, pH, and electrolyte balance to ensure optimal functioning of cells and systems. Homeostasis is critical for survival, allowing organisms to adapt to external changes and internal fluctuations. Mechanisms like feedback loops, involving receptors, control centers, and effectors, work together to restore balance when deviations occur, highlighting the dynamic nature of life and the importance of maintaining stable internal conditions.