The second overtone can also be called as ………………………harmonic.

Explanation

To determine what the second overtone can also be called, we need to understand the relationship between overtones and harmonics in wave physics.

### Step-by-Step Solution:

1. **Understanding Harmonics and Overtones**:
- Harmonics are the frequencies at which a system can vibrate. The first harmonic (or fundamental frequency) is the lowest frequency at which the system vibrates.
- Overtones are the frequencies higher than the fundamental frequency. The first overtone is the first frequency above the fundamental, and the second overtone is the next frequency above that.

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