The body systems that worked together to help James realize he was hungry and ready for dinner are:
- Digestive: This system is involved in the process of hunger and the preparation for digestion as food is perceived.
- Nervous: This system processes sensory information, such as the smell of the grilling hamburgers, and signals hunger to the brain.
The respiratory and excretory systems are not directly involved in the realization of hunger in this scenario.
So the correct responses are digestive and nervous.