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Option 3 : Petrifaction
(a) Hydrology - is predominantly concerned with the amounts and quality of water moving and accumulating on the land surface.
(b) Geomorphology is the field concerned with understanding the surface of the Earth and the processes by which it is shaped.
(c) Petrifaction - The process by which organic matter exposed to minerals over a long period is turned into a stony substance.
(d)Glaciology - Glaciology is the study of glaciers and ice sheets.
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