What is a natural product of both animal and human life?

The natural product of both human and animal life is waste. All living organisms, including animals and humans, produce waste products as a result of their metabolic processes. In animals, waste products can include urine, feces, and sweat, while in humans, they can include urine, feces, sweat, and carbon dioxide. These waste products are typically eliminated from the body through various means, such as excretion, sweating, and breathing. Additionally, dead organisms also contribute to the natural product of waste, as their remains decompose and break down into simpler substances.