Question

which part is responsible for photosynthesis?

Explanation:

In plant cells, chloroplasts are the organelles responsible for photosynthesis, where light - energy is converted into chemical energy.

Answer:

(There are no options given in the question, but if we assume the parts are numbered in a cell - related context and one of them is chloroplast - containing part) Without seeing the actual numbered parts clearly, if one of the parts is chloroplasts, that would be the correct answer as chloroplasts are key for photosynthesis. If we had to guess based on common knowledge and assuming the parts are related to a plant cell structure, and if one of the numbered parts represents chloroplasts, that part is responsible for photosynthesis.