What is the purpose of modulating a singnal in transmission?

Explanation

### Step-by-Step Solution:

1. **Understanding Signal Transmission**:
- In communication systems, signals are used to transmit information from one point to another. These signals can be of various frequencies, but low-frequency signals face challenges during transmission.

2. **Challenges with Low-Frequency Signals**:
- Low-frequency signals have limited range and cannot be effectively transmitted over long distances. This limitation arises due to various practical difficulties such as attenuation, interference, and the physical properties of the transmission medium.

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