Based on the phrasing of the options provided, the most reasonable answer is:
"The ecosystem is not balanced because more carbon is entering the atmosphere than being absorbed by the environment."
This choice reflects a common ecological concern where an excess of carbon in the atmosphere could lead to imbalances in the ecosystem, such as climate change.
However, without specific data or a visual graph to analyze, it's difficult to confirm this definitively. If you have access to the graph or specific data points, that would help in making a more accurate conclusion.