Final answer:
Chloroplasts are found in the mesophyll of plant cells, specifically in the upper palisade layer and lower spongy layer. These two layers of the plant contain chloroplasts where photosynthesis occurs.
Step-by-step explanation:
In plant cells, chloroplasts are found in the mesophyll, which is located in the middle of the leaf below the epidermis. The mesophyll consists of two layers: the upper palisade layer, which contains tightly packed, columnar cells, and the lower spongy layer, which contains loosely arranged, irregularly shaped cells. Both layers of the mesophyll contain many chloroplasts where photosynthesis takes place.