What reasoning correctly pairs a body system with its relationship to the digestive system?

Respiratory system.

Explanation:

This is the system which shows a good pairing with the digestive system. This is because for energy to be synthesized by oxidative phosphorylation,  respiratory systems need  the supply of  Oxygen. The oxygen is needed to accept the final electron in the synthesis of ATPs during oxidative phosphorylation.

This process begins with substrate level phosphorylation-glycolysis- the breaking down of glucose from the digestive system.

Hence, respiratory system needs  the  supply of oxygen for the metabolisms of glucose obtained from digestive system to generate energy( extract the energy in glucose) for the body.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

1. the energy lost to disorder metabolism     -entropy

2. related to or possessing motion potential     -kinetic

3. all of the chemical reactions in an organism required for maintenance of the processes of life entropy     -metabolism

4. possible; ability to go into action or perform work kinetic     -potential

5. the study of energy and its transformations thermodynamics     -thermodynamics