A portion of land or an enclosed space which is used to hold water until it is needed is called: B. reservoirs.
Water can be defined as a liquid (molecule) or chemical compound that typically contains two (2) main chemical elements in the ratio of two (2) to one (1). Also, these two (2) chemical elements are:
Generally, reservoirs are built as an enclosed space which is used to hold water until it is needed or for use in the future, so as to conserve water.
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