I would say burning and combustion of fuels. hopefully that helps you.
The question is really vague, there could be many answers. But I'm guessing it's hate violence. The definition of hate violence is: "<span>speech or behavior that is aimed at a person or group based on personal characteristics" so lol I guess that'd be it.</span>
A is the best answer. Hope that helped! If you don't understand why PM me and i can try to explain :)
The answer u r looking for is-B sweating, hope this helped :)
