Cross multiply the awnser is 10
Answer:
the US put themselves in icolation and ignores the rest of the world
They started domesticating wheat. This wasn't their main feat however since they also started herding sheep and domesticating goats. These two enabled them to stop moving around like nomads and make a real civilization in the area which resulted in what is now known as history.
Explanation:
I don't understand what your question is I need more information ?
