I'm not 100% sure but I think the right answer is
D. Emotional development will affect physical balance as an adult ages.
To keep your digestive system healthy, eat meals slowly.
Answer:
The efficiency of your heart to carry oxygen through the body.
Explanation:
Cardio-respiratory fitness is the relationship between your heart and your respiratory system during physical activity, and its efficiency in transporting oxygen to various parts of your body. What can define a good physical health is the efficiency in the absorption of oxygen by the muscles as well.
With the constant practice of Cardio-respiratory exercises the benefits to the body are enormous as: Increased muscle strength, endurance, better blood circulation and improved mental health.