Choose the type of semiconductor from the following options for which the electrical conductivity is due to the breaking of its covalent bonds.

Options

A. donor
B. acceptor
C. intrinsic
D. extrinsic

Explanation

To solve the question regarding the type of semiconductor for which the electrical conductivity is due to the breaking of its covalent bonds, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Semiconductors**:
- There are two main types of semiconductors: intrinsic and extrinsic.
- Intrinsic semiconductors are pure materials without any significant dopant atoms.
- Extrinsic semiconductors are doped with impurities to enhance their conductivity.

2. **Identify the Mechanism of Conductivity**:
- In intrinsic semiconductors, the conductivity arises from the breaking of covalent bonds between atoms in the semiconductor material.
- When thermal energy is supplied, some covalent bonds break, creating electron-hole pairs. The electrons can move freely, contributing to electrical conductivity.

3. **Analyze the Options**:
- **Donor**: Refers to extrinsic semiconductors that have been doped with elements that provide extra electrons.
- **Receptor**: Refers to extrinsic semiconductors that have been doped with elements that create holes (missing electrons).
- **Intrinsic**: Pure semiconductors where conductivity is due to the breaking of covalent bonds.
- **Extrinsic**: Semiconductors that have been modified with impurities to alter their electrical properties.

4. **Conclusion**:
- The type of semiconductor for which the electrical conductivity is due to the breaking of its covalent bonds is the **intrinsic semiconductor**.

### Final Answer:
**Intrinsic Semiconductor**