The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
The landscape and early tools, like the atlatl, were useful for early Oklahoman Civilizations such as the first immigrants, the Clovis Culture, in that the territory and the tools facilitated its nomadic life of hunters, following herds to hunt them and feed their families. They used to hunt Bison because it was the largest animal that provided more food for families.
