To create a tint of yellow, which color must be added?

To create a tint of yellow, it is essential to understand the concept of tints in color theory. A tint is produced by adding white to a color, which lightens that color while maintaining its hue. In this case, adding white to yellow results in a lighter shade of yellow, often referred to as a tint of yellow.

The other options do not produce a tint. Green and red would create different mixtures or shades rather than a tint of yellow. Black would darken the yellow, resulting in a shade rather than a tint. Therefore, to achieve a lighter version of yellow specifically, white is the necessary addition.