Why was Proitsta abandoned?

Kingdom Protista:

1. This group of organisms consists of unicellular, eukaryotic protists.
2. They are generally found in moist habitats.
3. They are usually parasites.

Kingdom Protista was abandoned because:

1. This kingdom is polyphyletic.
2. Polyphyletic organisms are a group of organisms derived from more than one common evolutionary ancestor or ancestral group.
3. Therefore, they are not suitable for being placed in the same taxon.