Paramecium and amoeba belong to the kingdom Protista. This kingdom is a diverse group that mainly consists of unicellular organisms, although some members are multicellular. Protists are eukaryotic, meaning their cells have a nucleus enclosed within membranes.
Both paramecium and amoeba are classified as protists because of their single-celled nature and their characteristics that distinguish them from plants, animals, and fungi. Paramecium are known for their slipper-like shape and cilia, which help them move through water. Amoebas, on the other hand, are recognized for their ability to change shape using pseudopodia, which allows them to move and engulf food.