Observe the diagram and answer the given question.

Which of the following does not constitute the underground store of carbon ?

CO₂

The correct answer is Option (4)- CO₂

Limestone and Dolomite: These are carbonate rocks that store carbon in the form of calcium carbonate and dolomite, respectively. They constitute a significant underground store of carbon.

Oil and Gas: These are fossil fuels formed from the remains of ancient organic matter that have been subjected to heat and pressure over millions of years. They are major underground stores of carbon.

Coal: Coal is another type of fossil fuel, primarily composed of carbon, formed from ancient plant material. It is also a significant underground store of carbon.

CO₂: Carbon dioxide (CO₂) is a gas found in the atmosphere and dissolved in bodies of water. While CO₂ can be found in some underground reservoirs (such as certain geological formations where it is stored as part of carbon capture and storage processes), it is not considered a major underground store of carbon compared to solid and liquid forms like limestone, dolomite, oil, gas, and coal.