Which of the following elements is fundamental to the RGB color model?

The RGB color model is based on the primary colors of light, which are red, green, and blue. These colors can be combined in various ways to create a broad spectrum of colors. When red, green, and blue light are mixed in different intensities, they can produce any color visible to the human eye. This model is particularly essential for digital displays, such as computer monitors and televisions, where light is emitted directly to produce images.

In contrast, the other choices present colors that do not serve as the foundational components of the RGB color model. Yellow, magenta, and cyan are part of the subtractive color models, which combine to create various colors in contexts like printing. Red and blue do appear in the RGB model, but the significant component, green, is missing in one alternative and does not reflect the complete RGB model. The last option references colors not relevant to the RGB framework at all. Therefore, the only correct answer is the combination of red, green, and blue, which forms the basis for the RGB color model.