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Dear student,
Please find below the answer:

The mode of nutrition in which organisms manufacture their own food using inorganic components like water and carbon dioxide as well as sunlight as the source of energy is known as the autotrophic mode of nutrition. 

Photoautotrophs- Those autotrophs which synthesis organic matters from inorganic substances using the energy from sunlight through photosynthesis are termed as photoautotroph. Some examples are Plants, Algae, Cyanobacteria, Phytoplanktons etc.

In photosynthesis, chlorophyll-containing cells synthesize food in the form of carbohydrates from carbon dioxide and water using sunlight. This food is transported to other parts of the plant through vascular tissue known as phloem. 

Hope this clears your doubt.
Regards.
 

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