Answer:
A Riding a bike after school
Explanation:
because rest of them can get you a hell lot of time in jail.
except that smoking kills
Veins are an important part of our circulatory system. They are responsible for returning deoxygenated blood back to the heart after arteries carry blood out. The vena cava is the largest vein in the body. Veins have much thinner walls than arteries.
Unintentional, Meaning not done on purpose or not thinking about it.
Hope that helps..
