What concept describes a graphical representation of an individual pixel corresponding to a bit?

The concept that describes a graphical representation of an individual pixel corresponding to a bit is indeed bitmap images. A bitmap image, also known as a raster image, is made up of a grid of individual pixels, where each pixel represents a specific color and is stored in memory as bits. This means that the quality and detail of a bitmap image depend on its resolution—the greater the number of pixels, the higher the image quality.

In a bitmap, when viewed at its native resolution, you can see the distinct pixels that together form the complete image. This pixel-based structure makes bitmap images ideal for detailed photographs and complex graphics, where color variations are critical.

Other options like vector images, graphic designs, and 3D models do not fit this description. Vector images are based on mathematical formulas and can be scaled without loss of quality, while graphic designs encompass a broader range of visual communication not limited to pixels alone. Additionally, 3D models represent objects in three-dimensional space and do not deal with pixel representation directly.