Life is a characteristic that distinguishes physical entities with biological processes, such as growth, reproduction, and response to stimuli, from those without such functions. It encompasses a vast array of organisms, from the simplest bacteria to complex mammals like humans. Each form of life plays a role in the ecosystem, contributing to the balance of nature. Human life, in particular, is marked by unique cognitive abilities, social structures, and cultural practices. It involves not only biological aspects but also emotional and intellectual experiences that shape our existence. The study of life, including its origins and evolution, is a central theme in biology and philosophy.