What type of representation involves each bit corresponding to an individual pixel on the screen?

The correct choice is based on how bitmap images are constructed and represented on a screen. A bitmap is a type of image representation where each pixel is directly addressed by bits in the data format. In this representation, the image is made up of a grid of pixels, and each pixel's color is determined by the corresponding bit values.

In a bitmap format, each bit or group of bits represents a color for an individual pixel, allowing for a precise and detailed display of images on screens. This pixel-based approach gives bitmap images their characteristic resolutions and makes them ideal for displaying complex images, such as photographs.

While raster and indexed images also involve pixel data, raster images are essentially synonymous with bitmaps in many contexts but could include additional complexities or formats. Indexed images use a color palette where pixel values refer to color indices rather than direct color values, making them less straightforward in regards to 1:1 pixel to bit representation.

In contrast, vector graphics use mathematical equations to describe shapes, lines, and curves, which is fundamentally different from the pixel-based structure of bitmaps. Thus, when discussing the representation where each bit corresponds to individual pixels, the bitmap format is the most accurate answer.