The answer is D. <span> invention of the first steel tools Actually, this very topic is still a hot debate among scientists because the shift happens on different reasons in each region of the world. But one thing they have in common is that Steel tools give the member of early societies the capabilities to rake uplands and cutting up crops that really useful in farming and herding.</span>
People saying racist things to each other or wars that move a group of people because of their race for example like the nazi party hitler didn't like jewish people.
