The correct answer is B. Geolocation.
Geolocation is the process of determining the geographic location of an object, such as a mobile device or computer. This can be done using a variety of methods, including GPS, IP address, and WiFi network information.
Voice portals are systems that allow users to interact with computers using voice commands. They are often used in conjunction with smart speakers and other voice-activated devices.
Sensor networks are networks of sensors that are used to collect data about the physical environment. They are often used in applications such as environmental monitoring and industrial control.
WiMAX is a type of wireless broadband technology. It is used to provide high-speed internet access to mobile devices and computers.
Geolocation is the most accurate way to identify a Web user’s location. It can be used to target ads, provide location-based services, and track user movements.
Voice portals and sensor networks can also be used to identify a Web user’s location, but they are not as accurate as geolocation.
WiMAX is not a method of identifying a Web user’s location. It is a type of wireless broadband technology.