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

using the scientific method.