Which need is at the foundation of Maslow's Hierarchy of Needs?

The foundation of Maslow's Hierarchy of Needs is comprised of physiological needs. These are the most basic human requirements for survival, including necessities such as air, water, food, shelter, sleep, and clothing. According to Maslow, until these fundamental needs are adequately met, individuals will find it challenging to focus on higher-level needs such as safety, social belonging, esteem, and self-actualization. This foundational concept emphasizes that without fulfilling these basic needs, individuals are unlikely to seek or attain higher levels of psychological or emotional well-being.