To and Fro or back and forth movement of an object is termed as:

Options

A. Frequency
B. Amplitude
C. Vibration
D. Time Period

Explanation

To solve the question, "To and fro or back and forth movement of an object is termed as:", we can follow these steps:

### Step 1: Understand the terms given in the options
We have four options to consider: frequency, amplitude, vibration, and time period. Let's briefly define each term:
- **Frequency**: The number of complete vibrations or cycles that occur in one second.
- **Amplitude**: The maximum extent of a vibration or oscillation, measured from the position of equilibrium.
- **Vibration**: The to and fro or back and forth movement of an object.
- **Time Period**: The time taken to complete one full oscillation or vibration.

### Step 2: Identify the correct term for the movement described
The question specifically asks for the term that describes the "to and fro or back and forth movement of an object." Among the options, the term that best fits this description is "vibration."

### Step 3: Confirm the answer with an example
To further confirm our answer, we can consider an example. When a guitar string is plucked, it moves back and forth, creating vibrations. These vibrations produce sound. This aligns perfectly with the definition provided in the question.

### Conclusion
Thus, the answer to the question is:
**Vibration**

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