The difference between hunger and appetite is that hunger
a. is uncontrollable but appetite is controllable.
b. occurs when a person becomes upset, whereas appetite occurs because a person needs energy.
c. is controllable but appetite is uncontrollable.
d. is a basic, physical response to the need for fuel, whereas appetite is a nonphysical response to eating, such as mood.

The correct answer is option D. The difference between hunger and appetite is that hunger is a basic, physical response to the need for fuel, whereas appetite is a nonphysical response to eating, such as mood. Hunger is a need to eat because you have not eaten anything for long time but appetite is always mood dependent and strongly based on your likings.

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.