What is the code snippet used to enable location tracking on the web?

The correct choice for enabling location tracking on the web is commonly understood to be related to functions that allow the application to access and utilize the device's location data. Among the options provided, "setLastKnownLocation()" specifically implies that the function is used to retrieve a previously saved geographical position of the device, which can be an important step in managing location data.

This involves obtaining the last known coordinates for a user’s device, allowing developers to use this information as a basis for tracking or updating user location effectively. By using this data, apps can enhance user experience by providing location-relevant content or services, especially if real-time tracking is not required.

Other options like "setCurrentLocation()", "startLocationTracking()", and "enableLocationServices()" suggest actions related to determining or starting location tracking but do not precisely indicate a method to obtain or save location data in the context provided in the question. "setCurrentLocation()" implies a function to set live tracking, "startLocationTracking()" indicates initiating a tracking process, and "enableLocationServices()" could relate to enabling location services on the device. However, none directly captures the act of referencing the last known location which is crucial in many applications that operate without real-time tracking.