When the inside and outside rearview mirrors on your vehicle are properly adjusted, a: you won't have to lean forward or backward to use the mirrors. b: you will lean forward to use the inside and outside rearview mirrors. c: you will lean forward to use the outside rearview mirrors, and lean backward to use the inside rearview mirror

The answer would be fracture.

The answer would be c (set)hope this ! (:

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases. 

Ican only answer your first question, a machine is like a human body because it's a little similar. they both almost work like the same.