What is a raster image comprised of?

A raster image is primarily made up of color pixels arranged in a rectangular grid. These pixels are the smallest unit of a digital image, each representing a specific color. When combined, they form the overall image that you see on a screen. Raster images are resolution-dependent, meaning that their quality is determined by the number of pixels used; higher resolution images have more pixels and appear sharper, while lower resolution images can look pixelated or blurry.

In contrast, vector images are composed of paths defined by mathematical equations, which allow them to be resized without losing quality. Text characters are separate entities that can be represented in either rasterized or vectorized forms but are not themselves images. Video frames are individual static images that make up a moving picture and are not a characteristic of raster images specifically. Thus, the composition of a raster image explicitly points to the arrangement of color pixels, making choice B the correct response.