Which of the following is considered a basic need for survival?

Water is widely recognized as a fundamental basic need for survival. It is essential for maintaining vital bodily functions, including hydration, digestion, nutrient absorption, and temperature regulation. Without adequate water intake, the human body cannot operate effectively, leading to severe health consequences and potential death.

In contrast, happiness, comfort, and leisure activities, while important for overall well-being and quality of life, are not critical for immediate survival. These factors often contribute to a person's mental and emotional health but do not directly impact the physiological requirements necessary to sustain life. Thus, in the context of basic survival needs, water stands out as an indispensable resource.