The correct answer is C. Hydration.
Hydration is the process of water combining with another substance to form a hydrate. This can happen when water molecules are attracted to the ions of a mineral, or when water molecules are absorbed into the crystal structure of a mineral. Hydration can also occur when water molecules are added to a substance that is already wet, such as soil or concrete.
Carbonation is the process of carbon dioxide gas dissolving in water to form carbonic acid. This can happen when carbon dioxide is released from the air into water, or when carbon dioxide is produced by the decomposition of organic matter. Carbonation can also occur when carbonated beverages are consumed.
Desilication is the process of removing silica from a substance. This can happen when silica is dissolved in
water, or when silica is leached out of a substance by acids. Desilication can also occur when silica is removed from a substance by mechanical means, such as grinding or abrasion.Oxidation is the process of a substance combining with oxygen. This can happen when a substance is exposed to air, or when a substance is heated. Oxidation can also occur when
a substance is mixed with a substance that contains oxygen, such as acids or bases.In conclusion, the correct answer is C. Hydration.