Concept:Chloroplasts are membrane-bound organelles found exclusively in plant cells and some algae, not in animal cells.
Explanation:Plant cells contain chloroplasts, which hold the green pigment chlorophyll.
Chloroplasts carry out photosynthesis, converting light energy into chemical energy stored as food.
Mitochondria are present in both plant and animal cells, so they are not found only in plants.
Lysosomes are mainly found in animal cells, not typically in plant cells.
The nucleus is present in all eukaryotic cells, including both plants and animals.
Therefore, the only organelle from the given options that is found exclusively in plant cells is the chloroplast.
Answer:Option B – Chloroplast.