Answer:
Vatican city.
Explanation:
Vatican city is an enclave located in the city of Rome, Italy.
The smallest country in the world is Vatican city also known as Holy See. It is measuring about 0.19 square miles in size and as such characterized by a very little population.
Basically, Vatican city is the central home of the catholic church and it does not have any permanent citizen. Therefore, citizenship is only granted to the people who work at the Vatican and it is revoked immediately they stop working there.
Additionally, the official language of the Vatican city is Italian and Latin.
Crust:outer silicate solid crust
mantle:highly viscous
core:solid inner core
Decomposer and scavengers