The source of energy in an ecosystem is-

Options

A. Sunlight
B. DNA
C. ATP
D. RNA

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the source of energy in an ecosystem.

2. **Consider the Options**: The options provided are:
- A) Sunlight
- B) DNA
- C) ATP
- D) RNA

3. **Analyze the Role of Each Option**:
- **DNA**: This is the genetic material in organisms and does not serve as a source of energy.
- **ATP**: Adenosine triphosphate is the energy currency of cells, but it is not the primary source of energy for ecosystems.
- **RNA**: Ribonucleic acid plays a role in protein synthesis but is not an energy source.
- **Sunlight**: This is the primary source of energy for most ecosystems, as it is utilized by producers (like plants and algae) to create organic matter through photosynthesis.

4. **Conclusion**: Since producers convert sunlight into chemical energy through photosynthesis, the major source of energy in an ecosystem is sunlight.

5. **Final Answer**: The correct option is **A) Sunlight**.

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