Extracting the original information-bearing signal from a carrier wave is called

CONCEPT:

• The process of increasing the volume of sound with the help of an amplifier is called amplifications.
• Extracting the original information-bearing signal from a carrier wave is called Demodulation.
• The process of transmitting the signal wave from one place to another is called transmission.
• The process of super imposing message signal on carrier wave is called modulation.

EXPLANATION:

• Since the extracting the original information-bearing signal from a carrier wave is called Demodulation. So option 2 is correct.