What is the result of all organ systems working together within the body?

The result of all organ systems working together within the body is the formation of an organism. An organism is defined as a living being that can function independently, made up of multiple organ systems that collaborate to support life. Each organ system, such as the circulatory, respiratory, and digestive systems, has specific functions, but they all integrate to maintain the overall health and viability of the organism. This cooperative interaction enables the organism to survive, grow, reproduce, and respond to environmental changes.

The other options, while related to biological concepts, do not specifically address the outcome of organ systems' collaboration in forming a life form. Multicellular organisms refer to living beings made of many cells but do not specifically denote the interworking of organ systems. Homeostasis is a critical function maintained by organ systems together but is more about balance rather than the result of their collaboration. Biological systems encompass various levels of organization in biology, but they are more general compared to the specific term 'organism' that highlights the fully functioning entity formed by these systems.