Answer:
The correct answer would be chloroplast.
A chloroplast is a green colored cell organelle found in plant cells. It contains chlorophyll which helps the plant cells to perform photosynthesis.
In contrast, the nucleus is present in all the eukaryotic cells.
Similarly, the cell wall is a protective layer present around the plasma membrane and provides extra support and protection to plant cells, archaea, bacteria, fungi, and algae.
Thus, the correct answer is chloroplast.
