Explanation
The correct answer is (C) Unreliable supply.
One of the disadvantages of most renewable energy sources is their unreliable supply. Unlike conventional energy sources like fossil fuels, which can be readily accessed and used as needed, renewable energy sources are dependent on natural factors such as sunlight, wind, or water availability. This means that their energy production can vary depending on weather conditions, time of day, or season. For example, solar energy is not available during the night or on cloudy days, and wind energy generation depends on wind speed. This variability in supply can pose challenges for maintaining a consistent and reliable energy output.
Options (A) Highly polluting, (B) High waste disposal cost, and (D) High running cost are not disadvantages typically associated with renewable energy sources. Renewable energy sources are generally considered cleaner, produce less waste, and have lower running costs compared to conventional fossil fuel-based energy sources.
