Because thats what our eyes see ?!
Answer:
Development refers to a positive and progressive change in somebody or something.
Answer:
It prevents minorities from advancing in society.
Explanation:
The term 'Untouchability' refers to a condition when a certain social group unable to obtain the opportunities or resources that exist in society.
Even until today, untouchability still pretty much exist all across the world.
For example, children from poor families generally do not have all the nutrients, educations, and network that are available for the children from rich family. Even if those children have equal potential within themselves, the sheer difference in situation make successful careers became almost an untouchable commodities for the poor children.
Mesopotamia introduced a more sedentary way of life by means of agriculture and animal husbandry. So for example, instead of the nomadic way of life, which is/was going hunting, foraging, and/or fishing.
Hopefully this is right and helpful. Good luck!