Which element defines a raster image?

• A. Vectors
• B. Layers
• C. Paths
• D. Pixels

Answer: (D)

A raster image is defined by its pixels—the tiny picture elements arranged in a grid that store the color value for every point in the image. Each pixel contributes to the overall picture, so the image’s detail depends on its resolution; zooming in reveals the individual pixels and may cause pixelation as you scale up.

In contrast, vectors describe images with mathematical formulas for shapes and curves, allowing infinite scalability without losing sharpness. Paths are the outlines of shapes in vector graphics, and layers are organizational levels that stack content but don’t define how the image is built.

So, the element that defines a raster image is pixels.