In the Figure Below,why Is There a Seasonal Variation in Carbon

question 31

Multiple Choice

In the figure below,why is there a seasonal variation in carbon dioxide (CO₂) concentrations?

• A) CO₂ concentrations rise and fall as photosynthesis decreases and increases.
• B) CO₂ concentrations rise and fall in conjunction with power plant emissions.
• C) CO₂ concentrations rise and fall with variations in solar radiation.
• D) The measurements were made in different places at different times of year.

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