Biology

The correct answer is D.Nucleolus.

The nucleolus is the part of the nucleus responsible for producing ribosomes. It is the site where ribosomal RNA (rRNA) is synthesized and combined with proteins to form the small and large subunits of ribosomes. These ribosomal subunits are then transported out of the nucleus to the cytoplasm, where they play a key role in protein synthesis.

Here's a brief explanation of the other components:

A.Nuclear Envelope: The double membrane structure that surrounds the nucleus and regulates the movement of mater...