Many bacteria are motile due to the presence of:

Explanation

Flagella are long, whip-like structures that many microorganisms, including bacteria and some single-celled eukaryotes, use for locomotion. These thread-like appendages are primarily involved in the movement of these organisms through their environment. Flagella can vary in number, structure, and arrangement depending on the species. The primary function of flagella is to enable motility. By rotating or waving in a coordinated manner, they propel the organism through liquid environments, such as water or bodily fluids.