With the help of examples,describe flagellated protozoans.

(N/A) $\rightarrow$ The members of this group are either free-living or parasitic.
$\rightarrow$ They possess flagella for locomotion,as their name suggests.
$\rightarrow$ They can be aquatic,free-living,parasitic,commensals,or symbiotic.
$\rightarrow$ Nutrition is holozoic,saprobic,or parasitic.
$\rightarrow$ Asexual reproduction occurs by binary fission.
$\rightarrow$ Sexual reproduction is observed in some forms only.
$\rightarrow$ Example: $Trypanosoma$ $brucei$,which causes sleeping sickness.