Final answer:
Ricardo is likely pointing to the chloroplast, the site of photosynthesis in plant cells, which converts light energy into chemical energy.
Step-by-step explanation:
If Ricardo is describing the process of photosynthesis and is pointing to a part of a cell diagram, he is most likely pointing to the chloroplast. Photosynthesis takes place inside the chloroplasts, which are specialized organelles found in plant cells. These organelles capture light energy and convert it into chemical energy through a series of reactions, producing glucose and oxygen as by-products. The chloroplasts contain thylakoid membranes where the light reactions of photosynthesis occur, and they are also involved in the Calvin cycle, which synthesizes sugar molecules.