Answer:
A. Stretching your legs before a run
Children are significantly affected by secondhand smoke. Children's bodies are still developing, and exposure to the poisons in secondhand smoke puts them at risk of severe respiratory diseases and can hinder the growth of their lungs.
When you run or do other exercises your working your cardiorespiratory system. when you work on something it gets stronger and more able to do excercises fpr a longer period of time
