Water had the capability to hold up the thin overhang of the underground.
When water is depleted, there is nothing to support this overhang, which eventually led to the formation of sinkholes.
As for the collective behavior, it's all because of the scarcity. Water is one of human's basic needs to survive. When water is scarce, this will force the people to compete with one another to obtain it, which will cause the behavior
No I think you need to do some more research
It helps us to use other resources such as Fossil Fuels to get energy. To get energy from them you have to burn them, which releases Carbon Dioxide when burned, which is bad for the atmosphere; CO2 (carbon dioxide) in the air is the main reasoned for global warming
Metaphase is a stage in the cell cycle where all the genetic material is condensing into chromosomes. ... During this stage, the nucleus disappears and the chromosomes appear in the cytoplasm of the cell. During this stage in human cells, the chromosomes then become visible under the microscope.
