Which of the following can be changed in the Settings app under Personalization?

The ability to change color themes and backgrounds falls under the Personalization section of the Settings app because this area is specifically designed for customizing the appearance of the operating system. Users can often select different color palettes, choose wallpaper images, or modify the lock screen settings to enhance their visual experience. This functionality allows individuals to tailor their device according to their preferences, which is a core purpose of the Personalization settings.

In contrast, account passwords, device security settings, and network configurations involve different categories of settings within the app. Account passwords typically fall under the Accounts section, security settings come under the Privacy or Update & Security sections, and network configurations are managed within the Network & Internet settings. Each of these categories addresses distinct administrative and security roles rather than focusing on the aesthetic customization of the device.