Final answer:
The section in question is the address bar of a browser where URLs are typed. The command toolbar and status bar are different elements of the browser interface. The command line interface can be accessed for specialized tasks using commands.
Step-by-step explanation:
The section of the browser window you are referring to is the address bar. The address bar is where you type the URL or web address to visit a webpage directly. It can also be used to perform a web search using the default search engine. The command toolbar contains buttons for commands such as refresh or home, and the status bar shows the loading status of a page or any relevant notifications. A search engine, on the other hand, is a service that allows you to conduct internet searches, which is often set as the homepage or embedded in the address bar functionality of modern browsers.
To use the command line for performing very specific changes, you can access it usually through the "Tools" menu under the "General Controls" sub-menu. Commands such as 'Command: del :.b' or 'Command: focus' are examples of specific tasks that can be performed via the command line interface.