Explanation
The command ls .../Documents/ lists the contents of the directory /home/user/Documents/. The reason is that the argument .../Documents/ is a relative path that refers to the parent directory of the current directory, which is /home/user/, followed by the subdirectory Documents/. The ls command displays the files and directories in the specified path, or the current directory if no path is given. The command does not change the current directory, so the user remains in /home/user/Downloads/. References:
* Linux Essentials Exam Objectives, Version 1.6, Topic 103.1, Weight 2
* Linux Essentials Certification Guide, Chapter 3, Page 49-50
* Ls Command in Linux (List Files and Directories) | Linuxize

Explanation
A private web browser window is a mode of browsing that prevents the browser from saving your browsing history, cookies, and other site data, or information entered in forms. However, it does not prevent websites, your employer or school, or your internet service provider from tracking your online activity. The main differences between a private web browser window and a regular web browser window are:
* Private web browser windows do not store cookies persistently. Cookies are small files that websites use to store information on your device, such as your preferences, login status, or tracking data. In a regular web browser window, cookies are stored until they expire or you delete them. In a private web browser window, cookies are deleted when you close all private windows.
* Private web browser windows do not keep records in the browser history. The browser history is a list of
* web pages that you have visited in the past. In a regular web browser window, the browser history is saved and can be accessed by anyone who uses the same device or profile. In a private web browser window, the browser history is not saved and cannot be viewed by anyone.
* Private web browser windows do not send regular stored cookies. When you visit a website in a regular web browser window, the browser sends any cookies that are stored for that website. This allows the website to recognize you and provide personalized content or services. When you visit a website in a private web browser window, the browser does not send any cookies that are stored in regular windows.
This prevents the website from identifying you or linking your activity across different sessions.
References: Browse in private - Computer - Google Chrome Help, Browse InPrivate in Microsoft Edge - Microsoft Support, Private Browsing: What Is It and How to Use It | Edge Learning Center