The answer is C; Jerusalem. It was a religious area that was fought for, because the religions trying to take control thought of it as a holy land.
To know the source of the chemicals, the gradient can be used in the hydraulic head among contaminated wells to estimate the groundwater flow paths.
<h3>What is a hydraulic head?</h3>
A hydraulic head refers to a selected size of liquid pressure above a vertical datum. It is commonly measured as a liquid floor elevation, expressed in devices of length, at the entrance of a piezometer.
Hence, To know the source of the chemicals, the gradient can be used in the hydraulic head among contaminated wells to estimate the groundwater flow paths.
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