The problem of respiratory system
A. Would be the answer I chose.
It said one of the following WORKOUT CHANGES, so I'm assuming that it doesn't want you to just stop. Different shoes may provide better support, bringing relief to the knees and allowing you to continue your walking workout.
<span>d. All of these 110%</span>
Answer:
Human Heart beats 100,000 times a day. (1 option is the correct answer)