explain how more advanced civilizations were able to develope techonology that allowed their citizens to move away from the river

The correct answer to this open question is the following.

More advanced civilizations were able to develop technology that allowed their citizens to move away from the river and protected them from flooding.

This technology first, allowed civilization to predict the flooding of the rivers, and then to take advantage of the flooding to increase crop production.

Let's not forget that ancient civilizations such as Sumeria, settled in the middle of two rivers: the Euphrates and Tigris. This represented many advantages to farming but also had its risks, basically, flooding. In the case of ancient Egypt, they settled in the banks of the Nile River, and they were one of the most successful civilizations that developed the kind of technology to avoid disasters due to flooding, and instead, growing good crops. The flooding of the Nile left rich soil to grow quality crops that they traded with other towns. The Egyptians also built underground channels to take the course of the water in times of flooding. Thes minimized the risk of massive flooding of their cities.

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the section of the chart that represents a point at which a bill needs approval from a majority of people in both chambers to advance is j, as this is the only section before the bill becomes law which has both rows (symbolizing the chambers) converging into one, meaning that the two parts of the congress have to approve of it before it can march on with the process.