Which of the following is a way the atmosphere recycles gases through interactions with the biosphere?

• A. Erosion of rocks by wind
• B. Evaporation of water from oceans
• C. Photosynthesis by plants converting atmospheric CO\(_2\) into organic matter
• D. Formation of igneous rocks from magma

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the concept of gas recycling in the atmosphere. Gas recycling refers to the processes by which gases like carbon dioxide (CO₂), oxygen (O₂), and nitrogen (N₂) are exchanged between the atmosphere and the biosphere, maintaining balance in ecosystems.
2. Step 2: Recognize the role of photosynthesis in gas recycling. Photosynthesis is a biological process where plants, algae, and some bacteria use sunlight to convert carbon dioxide (CO₂) and water (H₂O) into glucose (C₆H₁₂O₆) and oxygen (O₂). This process removes CO₂ from the atmosphere and produces organic matter, which is essential for life.
3. Step 3: Evaluate the options provided in the question. Erosion of rocks by wind and formation of igneous rocks from magma are geological processes, not directly related to atmospheric gas recycling. Evaporation of water from oceans involves the water cycle, not the recycling of gases like CO₂.
4. Step 4: Focus on the correct option: Photosynthesis by plants converting atmospheric CO₂ into organic matter. This process directly involves the interaction between the atmosphere and the biosphere, recycling CO₂ and producing oxygen.
5. Step 5: Conclude that photosynthesis is a key mechanism for recycling gases in the atmosphere, as it transforms CO₂ into organic matter and releases O₂, supporting life on Earth.