Which of the following is a luminous body?

Options

A. Fire
B. Earth
C. Moon
D. Tree

Answer

To determine which of the following is a luminous body among fire, earth, moon, and tree, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of a Luminous Body**:
- A luminous body is defined as a body that produces its own light.

2. **Evaluate Each Option**:
- **Fire**: Fire produces its own light through the process of combustion. Therefore, fire is a luminous body.
- **Earth**: The Earth does not produce light; it reflects light from the sun. Hence, it is a non-luminous body.
- **Moon**: The moon does not produce its own light; it reflects sunlight. Therefore, it is also a non-luminous body.
- **Tree**: A tree does not produce its own light; it reflects light from the sun. Thus, it is a non-luminous body.

3. **Conclusion**:
- Among the options provided, only fire is a luminous body.

### Final Answer:
The luminous body among the options is **fire**.

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