Jenna's pencil fell off of her desk and she quickly reached down to catch it before it hit the ground. In this process, the system first recognized the falling pencil. It sent signals to the system, which then moved the components of the system in order to catch the pencil.

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