Physiological needs are the basic requirements for human survival. These include essentials such as food, water, shelter, and sleep. Without meeting these needs, the body cannot function properly, leading to serious health issues. These needs are the foundation of Maslow's Hierarchy of Needs, a psychological theory that categorizes human motivations. Once physiological needs are satisfied, individuals can focus on higher-level needs, such as safety, love, and self-actualization. Meeting these basic needs is crucial for overall well-being and development.