The lands ruled by a King (or Queen).
Algae
animal kingdom
There are two: archae and eubacteria
single and multi celled organisms
Animalia is the kingdom that consists only of complex multicellular eukaryotic organisms.
The plantea kingdom includes all types of plants. Species in the plant kingdom have a nucleus and consist of complex cells.
The United Kingdom of Great Britain and Northern Ireland.
Curacao is a part of the Kingdom of the Netherlands. It is one of the five territories of the ABC islands in the Netherland Antilles which also consist of Aruba and Bonaire.
The Fungi kingdom includes multicellular heterotrophic organisms.
You can look at that in two different ways, but in either case the United Kingdom does not consist of two islands. One way is to say that there are many small islands that are part of the United Kingdom, so that is far more than two. In the other way, you could be thinking of just the two large islands of Britain and Ireland. However, in that case, only a small part of the island of Ireland is part of the United Kingdom, not all of it, so again it is wrong to say it consists of two islands. So whatever way you look at it, the United Kingdom does not consist of two islands.
If you meant the Sowbug, it belongs to the kingdom Animalia, which consists of all animals from worms to humans. I'll assume that doesn't help. Sowbugs belong to the Phylum Arhtropod. It consist of crustaceans and insects.
They are not all many celled. Yeast is a fungs and is composed of just one cell.