Renewable source of energy is

Question

Accepted Answer

Option 3, "Plants," is the correct answer because plants are a renewable source of energy. Renewable energy sources are those that can be replenished naturally over short periods of time and are sustainable in the long term. Plants, through the process of photosynthesis, convert sunlight into energy, which can be harnessed in various forms such as biofuels. This makes them a renewable resource because they can be grown and harvested repeatedly, provided that sustainable agricultural practices are followed.

Now, let's examine why the other options are incorrect:

1. **Coal**: Coal is a fossil fuel and is considered a non-renewable energy source. It forms over millions of years from the remains of ancient plants and animals buried under layers of sediment and rock. Once extracted and used, coal cannot be replenished on a human timescale, making it unsustainable in the long term.

2. **Petroleum**: Like coal, petroleum is a fossil fuel and is non-renewable. It is formed from the remains of ancient marine organisms that have been subjected to heat and pressure over millions of years. The extraction and consumption of petroleum deplete the available reserves, and it cannot be regenerated within a short period.

4. **Uranium**: Uranium is a heavy metal used as a fuel in nuclear power plants. It is not renewable because it is mined from finite deposits in the Earth's crust. While nuclear energy can produce large amounts of power, the uranium itself is not replenished naturally, and its supply is limited.

In summary, plants are a renewable source of energy because they can be regrown and harvested continuously, unlike coal, petroleum, and uranium, which are finite and cannot be replenished on a human timescale.