Concept:Plant and animal cells differ mainly in the presence of chloroplasts and other unique organelles.
Explanation:Plant cells contain chloroplasts, which are organelles used for photosynthesis.
Photosynthesis allows plants to make their own food using sunlight.
Animal cells do not have chloroplasts because they obtain energy by consuming other organisms.
This makes the presence of chloroplasts a clear difference between the two cell types.
The other options are incorrect because both cell types have a nucleus and a cell membrane, and animal cells do not have a cell wall.
Answer:C. Plant cells contain chloroplasts for photosynthesis, while animal cells do not.