Question

in which organelle do the chemical reactions of photosynthesis occur?

Explanation:

The question is about the organelle where photosynthesis occurs. Photosynthesis takes place in chloroplasts. Looking at the images, the fourth organelle (the oval - shaped one with internal membranes) represents a chloroplast. The first is a mitochondrion (for cellular respiration), the second is the Golgi apparatus (for processing and packaging), the third is a bacterium (prokaryote, no chloroplast for photosynthesis like eukaryotic plants). So the organelle for photosynthesis is the chloroplast, which is the fourth option.

Answer:

The fourth organelle (the one with the oval shape and internal membrane structures, representing the chloroplast)