Which of the following is the best balance to maintain low levels of carbon dioxide in the atmosphere? a small volume of plants with a small number of carbon sources
a small volume of plants with a large number of carbon sources
a large volume of plants with a small number of carbon sources
a large volume of plants with a large number of carbon sources

I think a small volume of plants with a large number of carbon sources

Explanation:

Though carbon dioxide is necessary for plants to live, too much carbon dioxide can reduce the amount of valuable nutrients the plant produces including iron, zinc and vitamin C. Plants take in oxygen from the environment, release carbon dioxide and produce waste products including glycolic acid, which a plant can’t use. In order for the plant to turn the glycolic acid into a product it can use, the plant has to do more photosynthesis, the process through which plants use sunlight, water and carbon dioxide to create glucose, a form of sugar that plants need to survive. So, as carbon dioxide levels in the atmosphere rise, there is less photorespiration and therefore less stress on plants. And the reduced stress means increased growth, but at a cost, a decline in the nutritional quality of the plants.

c. live where it’s cold and icy