Answer:
because a mosquito net prevent mosquito bites
It can be either they can have a negative or positive charge more specifically negatively charged molecule would called an anion and a positive one would be cation.
The answer would be B) 10,000 DM is equal to 1 kilometer.
Their valence electrons don't give them the ability to bond, they are also not in need to any electrons, since they won't get an octet soon.