This identification is based on the distinct morphological features of these organisms as shown in standard biology diagrams:

- Euglena: Identified by its spindle-shaped body and the presence of a flagellum (a whip-like structure) used for movement. It belongs to the group of Euglenoids.

- Paramecium: Characterised by its slipper-like shape and the presence of numerous tiny hair-like cilia covering its body, which it uses for locomotion and feeding.

- Agaricus: Commonly known as a mushroom, it is identified by its typical fungal structure consisting of a fleshy cap (pileus) and a stalk (stipe).

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