Which word means to make things thinner or sparser?

• A. Silent, reserved
• B. Unemotional lacking sensitivity
• C. Deceptively attractive
• D. To make things thinner or sparser

Answer: (D)

The main idea here is choosing a term by its core meaning, especially when a definition is stated in the option. The word that means to make things thinner or sparser directly describes thinning out or reducing density, so it matches the given definition exactly. That makes it the best choice because it names the precise action of thinning, not a state or appearance.

The other options describe qualities rather than actions: silent or reserved refers to demeanor, unemotional lacking sensitivity describes emotional tone, and deceptively attractive refers to appearance that masks something. None of those convey the act of becoming thinner or sparser.