What happens when the browser application finishes downloading the files necessary to display a web page?

When the browser application finishes downloading the necessary files to display a web page, it maintains the page in local memory and drops the connections. This means that while the downloaded files (such as HTML, CSS, images, etc.) are stored temporarily on the device to render the page correctly, the active connections to the web server used to fetch these resources are typically terminated.

This approach allows the browser to efficiently use resources by freeing up the connections after the data is successfully downloaded and displayed. However, the browser doesn't delete the downloaded files immediately; instead, it keeps them in local memory, so if the user navigates back to that page or another related resource, the browser can load it faster from the local cache instead of having to make another request to the server. This also contributes to a smoother browsing experience, as it decreases loading times for revisited pages.

The other options don't accurately reflect standard browser behavior after file download completion. For example, simply closing all connections or deleting files would not support an optimal user experience or the ability to efficiently navigate back and forth between pages. Maintaining resources in local memory is fundamental to enhancing the overall performance of web browsing.