Locomotion is the ability to move from one place to another. Protozoa are single-celled organisms that belong to the kingdom Protista. They exhibit a wide variety of locomotory methods, which allow them to move in their environment. One of the locomotory organelles found in protozoa is flagella.

Flagella:
- Flagella are long, whip-like appendages that protrude from the surface of some protozoa.
- They are responsible for the movement of the organism by propelling it through a fluid medium, such as water.
- Flagella are composed of microtubules arranged in a 9+2 pattern. This means that there are nine pairs of microtubules surrounding two central microtubules.
- The beating of flagella creates a wave-like motion that propels the organism forward.
- Examples of protozoa that possess flagella include Euglena and Trypanosoma.

Other Locomotory Organelles:
- Pseudocoelom is not a locomotory organelle in protozoa. Pseudocoelom is a fluid-filled body cavity found in some animals, such as roundworms, and is not relevant to protozoa.
- Tentacles are also not a locomotory organelle in protozoa. Tentacles are elongated, flexible structures found in some animals, such as jellyfish and sea anemones, that are used for capturing prey or for locomotion. They are not present in protozoa.
- Therefore, the correct answer is option C, flagella.

In conclusion, flagella are locomotory organelles found in some protozoa. They are responsible for the movement of the organism by propelling it through a fluid medium. Other options mentioned, such as pseudocoelom and tentacles, are not relevant to protozoa's locomotion.

Falgella