What is the primary benefit of using a CSS sprite?

Using a CSS sprite primarily reduces the number of HTTP requests made by a web page. A CSS sprite is a single image file that contains multiple images combined together, which allows a website to load all the required graphical elements at once. This technique is crucial for optimizing performance, particularly in scenarios where numerous small images are used, such as icons or buttons. By using a sprite, rather than having separate requests for each image, the browser can load one image file, resulting in fewer HTTP requests. This reduction significantly enhances page load times and minimizes server load, leading to a more responsive user experience.

The other options do not directly relate to the main advantage of using a CSS sprite. For instance, while enhancing image quality and increasing resolution might be desirable outcomes in some contexts, they are not the core benefits of utilizing sprites. Similarly, while improved rendering speed may occur as a secondary benefit, it is primarily a result of reduced HTTP requests rather than an inherent advantage of the CSS sprite technique itself.