Which one is a nonconventional source of energy

Options

A. Hydroelectric energy
B. biomass energy
C. solar pond
D. fossil fuel energy.

Answer

### Step-by-Step Solution:

1. **Understanding Energy Sources**:
- Energy sources are categorized into two main types: conventional and non-conventional. Conventional sources include fossil fuels, biomass, and hydroelectric energy, while non-conventional sources include renewable energy sources.

2. **Identifying Non-Conventional Sources**:
- Non-conventional sources of energy are those that are renewable and do not deplete over time. They are also less harmful to the environment compared to conventional sources.

3. **Examples of Non-Conventional Sources**:
- Some examples of non-conventional sources include:
- Solar energy (e.g., solar ponds)
- Wind energy
- Tidal energy
- Geothermal energy

4. **Contrasting with Conventional Sources**:
- Conventional sources, such as fossil fuels (coal, oil, natural gas), biomass, and hydroelectric energy, are typically non-renewable and can cause environmental pollution.

5. **Conclusion**:
- Based on the information gathered, the correct answer to the question "Which one is a non-conventional source of energy?" is **solar pond**.