For what purpose can the lighter form made by adding white to a colour be used?

Correct answer: To show a lighted or soft area

Answer: B, to show a lighted or soft area. When white is mixed with a colour, the result is called a tint. A tint has a lighter value than the original colour and can suggest sunlight, a highlight, a pale surface, distance, or a gentle mood. For example, adding white to blue produces a lighter blue, not a deep shadow. B is correct because a lighter colour is useful for showing areas receiving more light or for creating a soft visual effect. A is wrong because deep shadows are generally suggested with darker values; adding black produces a shade. C is wrong because white does not make a colour black. D is wrong because a tint changes visual colour and value, not the physical touch of a surface. Remember the basic distinction: colour plus white equals tint, and colour plus black equals shade. The exact visual result can depend on the pigment, but the lightening purpose remains the key idea.