Concept:Photosynthesis takes place in the chloroplast, the cell part that contains chlorophyll.Explanation:Water and carbon (IV) oxide combine to form sugar during photosynthesis.This process occurs in the chloroplast, which is the labeled part containing the green pigment chlorophyll.Among the labeled parts, the chloroplast is represented by part IV.Therefore, water and carbon (IV) oxide combine to form sugar in part IV.Answer:D. IV
