What is the function of the reproductive system?

The primary function of the reproductive system is to produce offspring. This system is designed to facilitate reproduction, enabling the continuation of species through the production of gametes (sperm and eggs) and the conditions necessary for fertilization and development of new organisms. The reproductive organs work together to ensure that genetic material from two parents can combine to create a new individual.

While hormone production is indeed a function associated with the reproductive system, especially in regulating sexual development and reproductive cycles, that is a supportive function rather than the primary purpose of the system. Breaking down food is the role of the digestive system, and transporting oxygen is the function of the respiratory and circulatory systems. Hence, all of those systems serve distinct and critical functions within the body's overall physiology, but when focusing on the reason behind the reproductive system's existence, producing offspring is the clear and definitive answer.