The two main categories of foreign policy enforcement are concrete and abstract. military and economic. hard and soft. strong and weak?

The right answer is Hard and soft

The enforcement of foreign policy can be applied in two diferent ways. Using hard power (the use of military power) or soft power (using cultural or economic influence). So if a country uses soft power to persuade another country instead of hard power, it means that to settle any diference, they won't choose any coercive measure.

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.