What is a pixel in the context of digital displays?

A pixel, or picture element, is the smallest unit of a digital image that can be displayed on a screen. Each pixel represents a single point in the image and can contain varying colors and brightness levels. In digital displays, pixels work together to form the entire image; the more pixels there are, the higher the resolution and detail of the image. High-resolution displays have a greater number of pixels, enhancing clarity and quality.

The other options reference relevant but distinct concepts. For instance, the largest unit of a digital image refers to the overall image size or composition, rather than individual components. Color depth pertains to the number of bits used to represent the color of a single pixel, affecting how many colors can be displayed. Resolution concerns the total number of pixels in the dimensions of the display or image, but it does not define what a pixel is. Thus, recognizing a pixel as the fundamental building block of a digital image underscores its essential role in digital displays.