Answer:
c. the internet of things
Step-by-step explanation:
Internet of things stands for IoT devices. the objects or devices which can be connected on internet and control by any of networking device comes under IoT devices.
IoT device is a combination of sensors, devices, and network working together. there are many sensors i.e PIR sensor, temperature sensor, light sensor, etc. which collect the information and send it over the connected devices. when it gets command it also acts on the same command like a printer function.
The example and most recent usage of IoT devices in the lighting automation, where the lighting of a house or office gets connected to the internet and can be controlled by any device connected with it.