Which option is NOT classified as a chemical change?

Desiccation is the process of removing moisture from a substance, which typically results in a physical change rather than a chemical transformation. In contrast, fermentation, oxidation, and combustion all involve chemical changes.

When something undergoes fermentation, it involves the breakdown of sugars by microorganisms, creating new substances such as alcohol and carbon dioxide. Oxidation refers to a reaction where a substance combines with oxygen, leading to a change in its chemical composition. Combustion is a rapid reaction with oxygen that produces heat and light, resulting in new chemical products such as carbon dioxide and water.

These processes involve the formation of new substances through chemical reactions, which is why desiccation stands out as the one option that represents a physical change rather than a chemical alteration.