Multiple choice

Which of the following statements best defines the carbon cycle?

A biogeochemical cycle occurs by decomposition of vegetations and incorporation of minerals naturally in humus for future development of plants. Circulation of chemical elements such as carbon, oxygen, nitrogen, phosphorus, calcium, and water, etc., through biological and physical world are called biogeochemical cycle.

  1. Movement of carbon through the lithosphere, hydrosphere, and biosphere.

  2. It is the movement of carbon within the atmosphere.

  3. It is the cycle by which carbon can be reused throughout the biosphere.

  4. It is a cycle where carbon is converted into different chemicals through biological and chemical processes.

  5. It is a group of processes where carbon is moved between minerals and living systems.
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C Correct answer
Explanation

Carbon cycle was invented by Joseph Priestley and Antoine Lavoisier, and later popularised by Humphry Davy. It is the most essential cycle where carbon is recycled and reused throughout the biosphere. Basically carbon is exchanged between hydrosphere and atmosphere.

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