Answer: Chloroplast
Explanation:
The chloroplast is the organelle which is used to convert light energy into chemical energy. The sunlight is trapped into the chloroplast and the with the help of carbon dioxide and water glucose is made.
The by-product of the photosynthesis is oxygen which is released into the environment. This oxygen is used by the animals and human beings in order to survive.
hence, the correct answer is chloroplast.