The correct option is C Flagella
Movement of bacteria
The flagellum is mainly a motility organelle, allowing movement and chemotaxis.
It is a hair-like or whip-like appendage that helps to propel the bacterial cell through water.
Thus, the flagellum helps a motile bacteria to move.
Pili and fimbriae doesn’t help in motility. Cilia is absent in prokaryotes.
Final answer
(C) Flagella