There is a considerable amount of chemical energy stored in a tall tree. For instance, the wood could be burned to make a great deal of heat. From where does the chemical energy come?

The chemical energy present in the tall trees comes from the Sun.  

•Through the process of photosynthesis, the tall trees convert energy from the Sun, that is, light energy into the chemical energy.  

•The majority of this energy is stored in the trees in the form of compounds known as carbohydrates.  

•When animals consume trees and its components, they consume and absorb some of this energy, that is, stored as chemical energy into the compounds protein and fats.  

Thus, the green plants and trees are the source of energy, that is, used for various purposes. Through the process of photosynthesis, the light energy coming from the Sun gets converted into the chemical energy that gets stored as carbohydrates.  

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The correct answer is - the sun.

Explanation:

When a plant is in initial stages there isgradual increase in  the mass of the plant which become later as a tall tree by the process of the phostosynthesis as it increase the storage of glucose or sugar in the tree. The mass of the tree by glucose storage is due to the carbon molecules of CO2 moleules.

Photosynthesis is the process that involves the trapping of the light come from the sun which is then converted in the cheical energy in the form of the glucose or the sugars.