1) Tigris and Euphrates river valley is where the Mesopotamia civilization began. Mesopotamia means "between the rivers". It was a Sumerian-Babylonian civilization.
2) Nile river valley was home to agricultural settlers in 5500 BCE. and its Egypt civilization started to grow around 3100 BCE.
3) Indus river valley. Civilization arose in 2600 BCE but fell due to its environment. Currently identified as Pakistan and India.
4) Yellow River valley in China. Civilization emerged in 1700 BCE and was known as the Huang-He River Civilization.
I believe it would be d because it related to children and a potential damage to them in particular
U.S poverty line is different from so to say the poverty line in in Afghanistan.
When a U.S citizen is considered below the poverty line that doesn't necessarily mean that they are living in filth. They simply do not make enough money per year. Since the US poverty line is 37,000 dollars, when a US citizen does not make that much in a year they are considered to live in poverty. As if you were to live in Afghanistan the poverty would be much different since they are forced to work in horrible conditions and I am talking really bad conditions. They live in such filth to the point that they have to go scavenge in the trash for food. They find it hard to make ends meet and buy food for there family.