Answer :

The four causes which help in weathering are as follow:

a) Oxidation, carbonatization, hydration, solutionization etc are some of the chemical reaction which continuously weaken the rock and helps in breaking of rock.


b) b)Wind break the rocks physically. Heat from the sun helps in expansion of rock during day time and in the night its contract due to cooling. Repeated expansion and contraction the rock become weak and start to break.


c) c) Rainwater too helps in weathering of rock. Rain water gets into the cracks of the rocks. When this water freezes, the crack become wide.


d) A man-made machine such as manufacturing equipment for construction, dynamite helps in breaking of rocks. Some living organism release different types of a chemical substance in nature which also helps in the weathering of rock.


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