Products that contain of deet seem effective in protecting against mosquito bites.

DEET is an active ingredient in most repellant products to drive away insects like mosquitoes. It is a well known product and this makes unpleasant to most pests. Products containing 30 percent of DEET is effective and recommendable mostly for children and for adults as well.

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