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* Sunlight as the Energy Source: Photosynthesis uses sunlight as its primary energy source.
* Conversion to Chemical Energy: Plants and other photosynthetic organisms capture sunlight and convert it into chemical energy stored in the form of glucose (a type of sugar).
* Foundation of Food Chains: This chemical energy is then passed on through food chains and webs, providing energy for all living things in the biosphere.
Without photosynthesis, there would be no way to convert the energy from the sun into a usable form for life on Earth.
