Raster graphics are made up of a grid of pixels, each with its own color value. These images are resolution-dependent, meaning that they have a fixed number of pixels and cannot be resized without losing quality. Larger size and quality raster graphics require more pixels, resulting in larger file sizes compared to vector graphics. Raster graphics are more suitable for photographs and images with complex color variations as they can display a wider range of colors and details. They are created using programs like Adobe Photoshop and are best for editing and manipulating photographs or creating digital art and illustrations that require a more organic and textured look. Because they are made up of a finite number of pixels, raster graphics can become pixelated and lose quality when enlarged as the pixels become more noticeable, resulting in a blurry or jagged image.