Question:

The process by which the information is modified with the help of locally generated carriers is called ___________.
(Scrambling / Modulation)

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Modulation modifies a signal using a carrier for transmission; scrambling hides content for security.
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Solution and Explanation

The correct answer is Modulation. Modulation is the process by which a message signal (such as audio or video) is modified with the help of a locally generated carrier signal to make it suitable for transmission over long distances. This process allows the signal to occupy a desired frequency band and improves its propagation characteristics. On the other hand, scrambling refers to the intentional alteration of a signal to make it unintelligible to unauthorized users, often used for signal security or subscription services.
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