The answer is 2 because the other ones dont calculate
If it cannot perform basic or normal tasks is has reached an unsafe level of fatigue
Answer:
Aid in Digesting Food.
Explanation:
The skeletal system is all of your bones. It gives a structure to the body, and it protects the organs in the body. The digestive system is all of the organs that process the foods and drinks you consume. It filters out toxins and absorbs nutrition and vitamins to create energy.