<span>Are at risk as much smokers for respiratory and circulatory diseases.
<span>Passive smokers</span></span>
Answer:
The heart is made of three layers of tissue. Endocardium, the thin inner lining of the heart chambers that also forms the surface of the valves. Myocardium, the thick middle layer of muscle that allows your heart chambers to contract and relax to pump blood to your body.
Explanation:
The answer is C- Having a peer in the car.
Reason: Peer pressure.
