The kingdom, Protista, includes

The kingdom Protista includes all organisms -unicellular or multicellular- that lack classification in the animal, plant or fungi kingdoms.

Explanation:

Protista is a heterogeneous group of eukaryotic organisms that is divided into several groups, according to their morphological and functional characteristics.

This kingdom include unicellular and multicellular organisms -autotrophic or heterotrophic- in which the genetic lineage of each group is not very clear, although a common ancestor and the existence of parallel evolution (paraphyletic) can be determined.

The groups into which the Protista kingdom is divided are:

Protists are said to be a heterogeneous group since no common characteristics have been identified among these different groups that could serve as a basis for defining them as a single whole.

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Characteristics of the protists link

your answer is going to be physical weathering