Question

How does regular exercise help maintain a healthy respiratory system?

Answer 1

Letter D seems correct

Answer 2

Answer: Option D

Explanation:

It helps lungs to become more efficient by improving the gas exchange in the lungs. Regular exercises improves the cardio-respiratory fitness making it easier for the heart to be supplied with oxygen.

Staying fit and active is important for the people who are suffering from cardio respiratory disorders must exercise regularly  in order to keep their heart fit.

The people suffering from respiratory disorders such as blockage should walk and exercise regularly.