The energy which we obtain from the sun is called solar energy or radiant energy. The sun's energy is stored in coal, natural gas, water and wind. Coal, oil, and natural gas are known as fossil fuels.
Fossil fuels were formed over millions of years ago when the remains and fossils of prehistoric plants and animals sank to the bottom of swamps and oceans. These animal and plant remain were slowly covered and crushed by layers of rock, mud, sand, and water. The pressure of all those layers caused the plants and animals to break down and change into coal, oil and natural gas. We use the energy in these fossil fuels to make electricity. As of the year 2019, most of the energy we use comes from fossil fuels. However, fossil fuels are known as non-renewable sources of energy. They cannot be used over and over again. This means that one day they will run out!
Which among the following is not a renewable source of energy?

Options

A. Solar energy
B. Biomass energy
C. Hydro-power
D. Geothermal energy

Explanation

To determine which among the given options is not a renewable source of energy, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Renewable vs Non-Renewable Energy**:
- Renewable energy sources are those that can be replenished naturally in a short period of time. Examples include solar energy, wind energy, hydropower, and geothermal energy.
- Non-renewable energy sources are those that do not replenish quickly and can eventually run out. Examples include fossil fuels like coal, oil, and natural gas.

2. **Analyze the Given Options**:
- The options provided are:
- A) Solar energy
- B) Biomass
- C) Hydropower
- D) Geothermal
- We need to determine which of these is not renewable.

3. **Evaluate Each Option**:
- **Solar Energy**: This is derived from the sun and is renewable as it is abundant and replenished daily.
- **Biomass**: This involves using organic materials (plants and animals) for energy. While it can be renewable, it depends on sustainable practices and the availability of resources.
- **Hydropower**: This is generated from the movement of water and is renewable as long as the water cycle continues.
- **Geothermal Energy**: This is derived from the heat stored beneath the Earth's surface and is also considered renewable.

4. **Identify the Non-Renewable Source**:
- Among the options, while biomass can be renewable, it is also limited by the availability of organic materials and sustainable practices. However, the question is asking for a source that is definitively not renewable.
- If we consider the context of the question, biomass can be seen as a non-renewable source if it is not managed sustainably.

5. **Conclusion**:
- Based on the analysis, the answer to the question "Which among the following is not a renewable source of energy?" is **B) Biomass**.