Who are the incas? What were they like and how was their civilization unique?

Who are the incas?

The Incas were a civilization in South America formed by ethnic Quechua people also known as Amerindians. In 1400AD they were a small highland tribe, one hundred years later in the early 16th century the Incas rose to conquer and control the largest empire ever seen in the Americas forming the great Inca Empire.

What makes the Inca civilization unique?

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.

the enslaved people onboard suffered from illness with some frequency

answer; i believe the correct answer is (favorable balance);