In the inset 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.

Question

Quizplus · Accepted Answer

Seasonal variation in carbon dioxide concentrations is mainly due to changes in photosynthesis. During the spring and summer, there is an increase in photosynthesis as plants and trees grow and take in more carbon dioxide, leading to a decrease in atmospheric carbon dioxide levels. In the fall and winter, photosynthesis decreases as plants die and decay, leading to an increase in atmospheric carbon dioxide levels. This cycle is known as the "carbon cycle" and is an important component of Earth's natural processes.

In the Inset in the Figure Below,why Is There a Seasonal