Biology

The correct answer is D.Vesicles.

Vesicles are small, membrane-covered compartments within cells that are involved in transporting substances. They can transport materials within the cell (e.g., between the ER, Golgi apparatus, and other organelles) or to the cell membrane for exocytosis (releasing substances outside the cell). They are crucial for processes like nutrient transport, protein secretion, and waste removal.

Here's why the other options are incorrect: