Explanation:

- Members of the phylum Protozoa, like Paramecium, Amoeba, and Euglena, exhibit the most basic level of organization.

- Protoplasmic (?): This is where all life functions occur within a single cell, making it the simplest type of organization.

- Cellular: In this stage, groups of cells form but don't necessarily perform distinct functions. This is seen in multicellular organisms slightly more complex than protozoa.

- Cell-tissue: Cells come together to form tissues that perform a collective function. This organization is seen in even more complex organisms.

- Tissue-organ: Further complexity, where tissues together form organs, is observed in higher organisms.

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