Which term means to gradually disappear or to become thinner or smaller?

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Multiple Choice

Which term means to gradually disappear or to become thinner or smaller?

Material loss from mechanical action is the idea here: surfaces rubbing or grinding away material over time. Wearing away exactly describes this gradual thinning or shrinking due to wear from contact. Erosion refers to material removal by moving fluids or wind, not just surface rubbing. Dissolution is a chemical process where material dissolves in a solvent. Deterioration is a broad decline that can include many factors, not specifically the mechanical thinning of a surface. So the best fit for gradual thinning due to wear is wearing away.

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