As the marketer for ClimbHigh.com, the user experience for the site is Maria's responsibility. She enjoys creating rich, impressive content that creates a welcoming environment for users. But the slow performance of the site frustrates her. What's a factor that's likely slowing down the performance of the website?

Large, unoptimized graphics files are a common cause of slow website performance. High-resolution images or numerous images on a page require more data to download, increasing page load times. While rich content is desirable, it must be balanced with performance considerations. XML and HTML are markup languages fundamental to web structure and data exchange; they are typically small files and do not inherently slow down a website. Localization refers to adapting a website for different regions or languages, which involves content translation and cultural adjustments, not directly impacting site speed in the same way as unoptimized assets.