How can CSS improve a website's performance?

CSS can significantly enhance a website's performance through the ability to cache stylesheets across multiple pages. When a stylesheet is linked to a web page, the browser can download and cache that stylesheet. This means that on subsequent visits to other pages using the same stylesheet, the browser does not need to re-download the file. Instead, it retrieves it from the cache, reducing load times and overall bandwidth usage.

This caching mechanism contributes to faster page rendering and a better user experience because it minimizes the number of requests made to the server. Additionally, it allows for a more streamlined approach to maintaining consistency in design across a website, as the same CSS file can be applied to multiple pages without requiring duplication of styles.

The other options do not effectively contribute to improving website performance. Embedding multimedia files directly in HTML can lead to larger file sizes and increased load times. Increasing coding complexity can make maintenance harder and potentially slow down development. Removing all graphics may reduce load times, but it adversely impacts the visual appeal and user engagement of the website. Therefore, leveraging CSS for caching optimally balances performance with aesthetic design.