Which property remains constant despite changes in form or arrangement?

• A. Classification
• B. Puberty
• C. Conservation
• D. Egocentric

Answer: (C)

This item tests invariance under transformation—the idea that something stays the same even as form or arrangement changes. Conservation captures that notion: in a closed system, certain quantities do not change as processes occur. A classic example is mass—the total mass before and after a physical change like melting, freezing, or a chemical reaction remains the same. The other options describe processes or traits that don’t reflect this invariant property—classification is sorting by similarities, puberty is biological development, and egocentric refers to a perspective-taking limitation. So, conservation is the best fit because it names the principle that a property remains constant across changes in form or arrangement.