Answer:
WiFi
Explanation:
WiFi is a standard wireless network configuration developed by IEEE (Institute of Electrical and Electronics Engineers) as a 802.11 standard.
WiFi is embedded in chips in computers and configured for finding wireless routers. WiFi certified points can identify each other, this standardized networks are available almost all online electronic devices.
Wi-Fi Alliance is the authority to certify devices which satisfy the IEEE 802.11 standards.
The answer is C.wind machines only generate electricity when wind is blowing
