When a person has a severe fever, one therapy used to reduce the fever is an “alcohol rub”. explain how the evaporation of alcohol from a person’s skin removes heat energy from the body.?

Alcohol evaporates faster than water or sweat and causes a cooling sensation on the skin as it evaporates. Any liquids do this but since alcohol evaporates faster it's more noticeable.

Or if you want a better answer

Evaporation requires energy to change from liquid to a gas, and that energy comes from whatever the liquid is on, ie; your skin in this case. The energy gets transfered from your skin, in the form of lost heat energy, to the evaporating liquid, resulting in a drop of temperature. Refrigerators use this principle to cool the inside. The faster the evaporation rate, the larger the drop in temperature. Hope this helps. 

Animals will lose energy because it is converted to heat