Bacteria move using flagella. These are long, whip-like appendages that rotate like tiny propellers, propelling the bacterium through its environment.

Here's a breakdown:

* Flagella: These are the primary structures responsible for bacterial movement.

* Rotation: Flagella rotate in a helical motion, pushing the bacterium forward.

* Types of Flagellation: Different bacteria have different arrangements of flagella:

* Monotrichous: One flagellum at one end.

* Lophotrichous: A tuft of flagella at one end.

* Amphitrichous: Flagella at both ends.

* Peritrichous: Flagella distributed all over the surface.

* Chemotaxis: Bacteria can sense and move towards or away from chemicals in their environment. This is called chemotaxis.

It's important to note that not all bacteria have flagella. Some move using gliding mechanisms or by changing their shape.