Which of the following adds/add carbon dioxide to the carbon cycle on the planet Earth? 1. Volcanic action 2. Respiration 3. Photosynthesis 4. Decay of organic matter Select the correct answer using the code given below:

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Correct answer: 1, 2 and 4 only. The carbon cycle is a biogeochemical process where carbon atoms continuously move between the atmosphere, oceans, soil, and living organisms through processes like photosynthesis, respiration, decomposition, and combustion. Through photosynthesis, plants absorb atmospheric CO2 to produce glucose, while animals release CO2 through respiration, and when organisms die, decomposition returns their carbon to the soil and atmosphere, completing this vital planetary cycle. Statement 1 is correct: Volcanic eruptions release CO₂ stored in Earth’s mantle into the atmosphere, contributing to the carbon cycle. Statement 2 is correct: Respiration is the process by which organisms, including plants and animals, convert organic compounds into energy, producing CO₂ as a byproduct. This CO₂ is then released into the atmosphere. Statement 3 is incorrect: Photosynthesis is the process by which green plants, algae, and some bacteria absorb CO₂ from the atmosphere and, using sunlight, convert it into glucose and oxygen. This process removes CO₂ from the atmosphere. Statem

Which of the following adds/add carbon dioxide to the carbon cycle on the planet Earth?1. Volcanic action2. Respiration3. Photosynthesis4. Decay of organic matterSelect the correct answer using the code given below:

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Which of the following adds/add carbon dioxide to the carbon cycle on the planet Earth?1. Volcanic action2. Respiration3. Photosynthesis4. Decay of organic matterSelect the correct answer using the code given below:

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