An exercise program is most beneficial to one's health when done in conjunction with
a. a partner
b. patience
c. lifestyle changes
d. a positive attitude

Answer – C. lifestyle changes
 Talking of Lifestyle, lifestyle simply means the practices, approaches, tastes, moral principles, values, standards, beliefs, economic level, etc., that collectively establish the way of living of a person or group of people. For an exercise program to be beneficial to one's health then it should be done in combination with lifestyle changes.

The alveoli are what give the lungs so much space, and if they are big, there is more gas exchange than if they are small.