There's nothing on the list you provided that's related to Coulomb's Law.
W=F*s
W=9000*0
W=0
W:Work
F:Force
s:Distance
The reactants are the substances that start the chemical reaction, while the products are the substances that are produced due to the chemical reaction.
In the chemical reaction of the problem:
the substances on the left (Zn and S) are those that start the reaction, so they are the reactants, while the substance on the right (ZnS) is the one produced in the reaction, so it is the product.
I think it's c because the first 2 it's kind of oves gills and lungs we and fish use theme to live skin i know there a animle that uses it's skin to brith i don;t rember it's name thow sorry i cant spell well but,hope this helped :)