Look at the following diagram of the carbon cycle. An image of carbon cycle is shown. The sun, a cloud, two trees, one on the left and the other on the right, an animal, lake, and a factory are shown in the image. An arrow is shown from the sun towards the left tree marked A. The sun is marked B. There is an arrow from the air above the clouds, marked C, towards the left tree. An arrow from a location close to the ground marked D points towards Dead Organisms, which is a label under the animal. An arrow marked E points from the right tree straight up to the clouds. An arrow marked F points from the animal straight up to the clouds. An arrow marked G points from the factory towards the air above the clouds, C. There is an arrow pointing from the air to the lake labeled Carbonates in Water, an arrow pointing down from dead organisms to Fossils and Fossil Fuels, and an arrow from Fossils to the factory.

Which of the following facts is best represented by the arrow pointing from C to A?

The energy stored in atmospheric carbon dioxide is conserved because it is used to create new forms of energy present in decomposed plants.
The energy stored in atmospheric carbon dioxide is conserved because it is transformed into glucose during photosynthesis.
The chemical energy present in carbon dioxide is reduced when it is converted into chemical energy in glucose.
The chemical energy present in carbon dioxide is used up completely during the burning of trees.