Death is the end of life, marking the cessation of all biological functions that sustain an organism. It is a natural part of the life cycle for all living beings, including humans, animals, and plants. When an organism dies, its body undergoes decomposition, returning nutrients to the environment. The concept of death varies across cultures and religions, often influencing beliefs about the afterlife or the continuation of the spirit. While it can be a source of fear and sadness, death also serves as a reminder of the value of life and the importance of cherishing our time with loved ones.