The commonest source of bioenergy is
(a) Gobar gas
(b) Charcoal
(c) Fuel wood
(d) Wood gas

Options

A. Gobar gas
B. Charcoal
C. Fuel wood
D. Wood gas

Answer

To determine the commonest source of bioenergy from the given options, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Understanding Bioenergy**: Bioenergy is energy derived from biological materials. Common sources include organic materials like plants and animal waste.

2. **Analyzing the Options**:
- **(a) Gobar gas**: This is produced from the anaerobic digestion of organic matter, particularly animal dung. While it is a source of bioenergy, it is not widely used in all areas and is more localized.
- **(b) Charcoal**: Charcoal is made from burning wood in the absence of oxygen. It is a source of bioenergy but is relatively more expensive and not as commonly used as other sources.
- **(c) Fuel wood**: This refers to wood that is used as a fuel to produce energy. It is one of the most common sources of bioenergy, especially in rural areas where it is readily available and affordable.
- **(d) Wood gas**: This is a gas produced from the gasification of wood. While it can be used as a fuel, it is not as commonly used as fuel wood.

3. **Conclusion**: After analyzing all the options, it is clear that **fuel wood** (option C) is the most common source of bioenergy. It is widely used for cooking and heating in many parts of the world.

### Final Answer:
The commonest source of bioenergy is **(c) Fuel wood**.

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