What generalization is true about the Inca civilization

What was special about the Inca civilization?

Famed for their unique art and architecture, they constructed finely-built and imposing buildings wherever they conquered, and their spectacular adaptation of natural landscapes with terracing, highways, and mountaintop settlements continues to impress modern visitors at such world famous sites as Machu Picchu.

It was like nothing anyone had ever seen. Well – they did call it The Wrath of God, after all.

The Inca had spent days creating the massive barrier of litter spread across the Sacred Valley, refusing to allow any warriors or banner-bearers to pass and stumbling their way through the high altitude heat. But the barrier was the least of it.

For there were things amidst the mountains of cast-off belongings, things that howled and rolled in the mass of rubbish.

Explanation:

I'm not sure it's correct but I hope it helps a bit

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.