________ is a mode of communication in itself, and it also regulates the use of other means of communication.

The Correct Answer is: (d) Satellite

Explanation:
A satellite serves as a mode of communication by transmitting signals between distant locations across the globe.

It facilitates data, voice, and video transmission and is vital for broadcasting, internet services, telephony, and military communication.

Information Booster:
• The first communication satellite was Telstar, launched in 1962.
• India’s major communication satellite series includes INSAT and GSAT.
• Geostationary satellites remain fixed above one location, aiding constant communication.
• Satellites are used in weather forecasting, military surveillance, and disaster management.
• Organizations like ISRO, NASA, and SpaceX deploy communication satellites.

Additional Information:
• Television – A receiver-based system, it uses satellite or cable to function; not a regulatory system by itself.
• Radio – A terrestrial communication medium; its reach is limited compared to satellite.