Well from what I know they did use obsidian, they did live in large numbers and did take shelter in the highlands. Hope this helps
Sofia is the capital. Hope this helps you.
"the americans supported the indian removal act because the colonies wanted their lands. they were tired of constantly crossing boundaries with the indians' hunting grounds and such. americans also considered indians to be savages. they constantly fought with each other. so the indian removal act forced indians to move west, this being known as the trail of tears. thousands of indians died on this journey."
To be precise , the continent such as Europe, does not exist. Continent is called Eurasia and Eurasia - the largest continent in the world. Answer: B.