Which of the following bryophytes provides a product that is commonly used as fuel?

Options

A. Funaria
B. Sphagnum
C. Polytrichum
D. Marchantia

Answer

To solve the question "Which of the following bryophytes provides a product that is commonly used as fuel?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand Bryophytes**:
- Bryophytes are non-vascular plants that include mosses, liverworts, and hornworts. They are often found in moist environments and are known for their dependence on water for reproduction.

2. **Identify the Bryophytes**:
- The question likely provides a list of bryophytes to choose from. Common examples include Sphagnum, Marchantia, and Polytrichum.

3. **Research Economic Importance**:
- Some bryophytes have economic significance. For example, Sphagnum moss is known for its ability to retain water and is used in horticulture and as a soil conditioner.

4. **Focus on Fuel Production**:
- Among the bryophytes, Sphagnum is particularly notable because it can produce peat, which is a type of fuel. Peat is formed from the accumulation of partially decayed organic matter in waterlogged conditions.

5. **Conclude the Answer**:
- Based on the information gathered, the bryophyte that provides a product commonly used as fuel is Sphagnum. Therefore, the correct answer is option B.

### Final Answer:
**Option B: Sphagnum**