Chlorophyl, its vital for photosynthesis and allows plants to absorb energy (sunlight),
Another option would be sunlight if chlorophyl is not it.
Answer: Chloroplast
Explanation:
Chloroplast is the cell organelle which is required by the plants to trap sunlight which is used to convert light energy into chemical energy.
This reaction takes place in the green parts of the plant. There is green pigment present in the leaves and stem which is used to trap sunlight and the product of photosynthesis is also produced there.
Oxygen is a by-product of this chemical process which is released in the outer environment.
