Why do you think doctors administer a saline solution instead of pure water to dehydrated patients?

The body needs salt and electrolytes to regulate bodily functions. The body will also absorb more water with higher salt concentrations

It is due to the salts/electrolytes in the saline solution. The body needs these to function properly. Also if pure water to be used, it would cause hemolysis of the red blood cells. 

I’m going to guess these are the choices: a) recreational skiing developed in the mid-19th century b) it was originally invented as a way of getting from place to place in snowy regions c) downhill skiing is currently the only common form of the sport d) it mostly evolved from snowshoeing- if that’s the cases then the answer would be c) downhill skiing is currently the only common form of the sport