Any stimulus an animal or person will avoid, given the opportunity to do so is:
a) an aversive
b) an avoidant stimulus
c) a reinforcer
d) a punisher

Any stimulus an animal or person will avoid, given the opportunity to do so is: an aversive

Explanation:

Aversives are abhorrent stimuli which cause variations in behavior through punishment; by implementing an aversive promptly following a behavior, the reasonableness of the behavior happening in the future is decreased. Aversives can differ from being lightly unpleasant or irritating to physically abusing.

It is not the level of unpleasantness, but preferably the effectiveness the unpleasant event has on modifying behavior that determines the aversive. It's more generally used in very precise writing, though, especially on the topics of psychology and sociology. The application of aversive methods and punishment procedures, is one of the main ideas that the public requires security by licensing behavior analysis.

trade regulation is a field of law, often bracketed with antitrust (as in the phrase “antitrust and trade regulation law”), including government regulation of unfair methods of competition and unfair or deceptive business acts or practices. antitrust law is often considered a subset of trade regulation law. franchise and distribution law, consumer protection law, and advertising law are sometimes considered parts of trade regulation law.

in general the theory of economics says that the more open to trade a country is the better   the result for the same country and the whole economies.

in real life countries impose taxes, quotas, etc which is not so good for the economies.

this kind of commercial war between the usa and china is slowing down the growth of the whole world so we can say that it is a draw back of trade regulations. and the free trade agreements are benefits of trade regulations.