Which one of the following is classified under the physical processes of weathering?
Water pressure
Weathering is broadly classified into physical (mechanical) and chemical weathering. Physical weathering disintegrates rocks without altering their chemical composition, through processes such as pressure release, frost action and water/ice pressure. Oxidation, carbonation and hydration, on the other hand, are chemical weathering processes that change the chemical composition of the rock. Hence, water pressure is the physical weathering process among the given options.
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