Naina B. answered 09/09/16
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Photosynthesis occurs in chloroplasts, that store chlorophyll, a molecule responsible for utilizing solar energy for food production.
All green parts of plants have chloroplast, however, they are concentrated in green leaves.
Chloroplasts are present in green stems as well as in green unripened fruits.
You may pick up any two of these green sites that would produce food for the plants by photosynthesis.
Hope this helps.