Which type of protist is most like a fungus

Slime molds and water molds

Explanation:

Slime molds and water molds are fungus-like protists. Like a fungus, they have a cell wall around their cells. Both slime mold and water mold are heterotrophic and can not make their own food. They also derive their nutrition from dead and decaying organic matter.

Like a fungus, these two protists also reproduced by the formation of spores.