1. Sunlight and then transferred to sugar :)
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The energy released in a forest fire originally comes from the sun. Trees and other plants use sunlight to photosynthesize and grow, storing energy in the form of carbohydrates. When a fire occurs, these stored carbohydrates are released as heat and light energy.
In an endothermic reaction, the energy that is released was originally stored in the chemical bonds of the reactants. As the reactants are converted into products during the reaction, this stored energy is released.
The energy in rice originally comes from the sun. Through the process of photosynthesis, rice plants convert sunlight into chemical energy stored in the form of carbohydrates like starch. When we eat rice, we are essentially consuming that stored energy.
The process in which energy is released from glucose is called cellular respiration. This process involves the breakdown of glucose in the presence of oxygen to produce energy in the form of adenosine triphosphate (ATP) along with carbon dioxide and water as byproducts.
I suppose that these are synonyms.