The best example is their amazing system of roads. The Incas built roads across the length and width of their empire. To create routes through steep mountain ranges, they carved staircases and gouged tunnels out of rock. They also built suspension bridges over rivers.
Hope this helps
<span>Ore deposits of the element Aluminium do not require extreme concentrations because it is one of the most abundant elements in the earth's crust.
</span><span>Aluminium is the most common metal in the </span><span>Earth's crust.
</span>However aluminium can not be found free stand alone. All of the earth's aluminum<span> is combined with other elements to form compounds.</span>
I believe it is C. They were nomads and followed their prey.
