Its urgent please anyone give the brief answer

10. Write the root cause of water scarcity.

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Explanation:

Water scarcity is the lack of sufficient available water resources to meet the demands of water usage within a region. Water shortages may be caused by climate change, such as altered weather patterns including droughts or floods, increased pollution, and increased human demand and overuse of water.

not only is it colder, it also becomes darker, less salty, and more dense.