Why there is a need to take a break for exercise after a long hour of sitting?

Because if you don’t take breaks you’ll get tired very easily and your brain won’t work if it’s tired so it won’t be able to process anything you learn or read.

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