Conversion of light energy into chemical energy is a function of:

Explanation

The conversion of light energy into chemical energy occurs in the grana of chloroplasts. Grana are composed of thylakoids, which contain chlorophyll, the pigment responsible for capturing light energy. This energy is used to produce ATP and NADPH, which are essential for the photosynthesis process. The other options, such as mitochondria, cytoplasm, and stroma, do not perform this specific function. Mitochondria generate ATP through cellular respiration. The cytoplasm supports cellular processes but does not convert light energy. The stroma facilitates the Calvin cycle but does not capture light energy directly.