Which privacy-related feature allows users to control how they are tracked online?

The privacy-related feature that allows users to control how they are tracked online is privacy settings. These settings are typically found in web browsers and various platforms, enabling users to customize their tracking preferences, cookie handling, and data-sharing permissions. By adjusting these settings, users can enhance their online privacy, limit the collection of their personal information, and influence how advertisers and websites track their online activities.

Other options, while useful in their own right, do not directly pertain to user control over tracking. Browser themes are primarily aesthetic modifications without privacy implications, bookmarks are used for saving URLs for easy access, and extensions may offer additional functionalities but can sometimes compromise privacy if not used carefully. Therefore, privacy settings stand out as the primary means through which users manage their online tracking and safeguard their personal information.