What structure enables sperm cells to move effectively?

Centrioles are cylindrical structures found in eukaryotic cells that play a critical role in cell division by organizing the mitotic spindle. While they are essential for cellular processes, they do not contribute to the motility of sperm cells, thus making them an incorrect choice for this question.

Cilia are hair-like structures that can move fluid or mucus across the surface of cells and are involved in various cellular processes. Although cilia can aid in movement, they are not the primary structure responsible for the propulsion of sperm cells, which rely specifically on flagella for effective locomotion.

The centrosome is a structure that serves as the main microtubule organizing center for the cell and is crucial for the formation of the spindle apparatus during cell division. While it plays an important role in cellular organization, it does not facilitate movement in sperm cells, making it an unsuitable answer.