Because it was isolated from areas since the land is protected by an ocean, deserts, and dry mountains.
The answer would be Kingdom Protista
There is 6 kingdom in biology: Animalia, Plantae, Fungi, Protista, Bacteria, Archaebacteria. Kingdom Protista has a diverse kind because its member is the organism that could not be classified as Animalia, Plantae or Fungi.
Since the classification based on exclusion, Protista member has less similarity than other kingdoms. That is the reason that protista called "grab bag" kingdom.
I can help you with that!
True as I am a poet myself.
