The correct answer is: B. wireless sensor network
A wireless sensor network (WSN) is a network of spatially distributed autonomous devices that are able to sense or monitor the physical environment, such as temperature, sound, vibration, pressure, etc., and to cooperatively send the data to a main location for processing.
A wired sensor network is a network of sensors that are connected to each other by wires. This type of network is typically used in industrial settings where there is a need for a high level of reliability and security.
A wired service network is a network of devices that provide services to users. This type of network is typically used in office buildings and homes where there is a need for a high level of connectivity.
A wireless service network is a network of devices that provide services to users over a wireless connection. This type of network is typically used in mobile devices and laptops where there is a need for a high level of mobility.