A stretched string is used in musical instruments because

Options

A. It vibrates only under tension
B. It is rich in harmonics
C. Poor in overtones
D. Only even harmonics are present

Answer

To solve the question "A stretched string is used in musical instruments because...", we need to analyze the options provided and understand the properties of stretched strings in the context of musical instruments.

### Step-by-Step Solution:

1. **Understanding the Role of Stretched Strings**:
- Stretched strings are fundamental components in many musical instruments. They produce sound by vibrating when plucked, struck, or bowed.

2. **Analyzing the Options**:
- **Option 1: It vibrates only under tension**: This statement is partially true, as a string must be under tension to vibrate, but it does not explain why it is used in musical instruments.
- **Option 2: It is reaching harmonies**: This option suggests that stretched strings can produce harmonic frequencies, which is a key characteristic of musical instruments.
- **Option 3: It is pouring over comes**: This option is unclear and does not relate to the properties of strings.
- **Option 4: Only even harmonies are prepared**: This statement is incorrect because stretched strings can produce both even and odd harmonics.

3. **Identifying the Correct Answer**:
- The most relevant option is **Option 2: It is reaching harmonies**. Stretched strings can vibrate at various frequencies, producing a range of harmonics that contribute to the musical quality of the sound.

4. **Conclusion**:
- Therefore, the reason a stretched string is used in musical instruments is that it can produce harmonics, allowing for a rich variety of musical notes.

### Final Answer:
A stretched string is used in musical instruments because it is reaching harmonies.

---