The organism has a long hair-like structure called flagella protruding out from its body. So the correct option is A.
Any cell or any organism that has flagella will be called a flagellate. Some organisms will only have flagella in certain stages of their life cycle, others will have them throughout their life.
Flagella are also referred to as a group of species of protozoans that are characterized by the presence of one or more flagella.
In the 5 kingdom system of organization, protozoans are further classified into 4 groups based on the mode of their locomotion. This classification is now outdated and replaced by one that classifies them bases on their genetic structure. These terms are still used to describe the level of organisation.
An organism can have one or more than one flagella. The singular term for flagella is the flagellum. Some organisms have one flagellum on each end like euglena.
The flagellum is a locomotory organ used by organisms to move from one place to another in an aquatic environment.
Therefore, the correct option is A.
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