In the context of the carbon cycle, "X" could represent Photosynthesis. This is because plants and algae take in carbon dioxide from the atmosphere during photosynthesis, which adds to the mass of carbon in the atmosphere.
The graph shows the mass of carbon added to and removed from the atmosphere each year. Mass of carbon in billions of tonnes per year Added to the atmosphere Removed from the atmosphere 100 50 0 50 100 Respiration by plants and algae Respiration by animals Respiration by microorganisms Item 15 Item 16 Item 17 Process X by plants and algae Combustion < Item 18 Item 19 Item 20 Item 21 Item 22 150 150 What could "X" represent? (1 point) Diffusion Photosynthesis Decomposition Consumption
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