nucleus
A land area that contains two continents is called an isthmus. It serves as a narrow strip of land connecting two larger landmasses, separating two bodies of water. Examples include the Isthmus of Panama connecting North and South America, and the Isthmus of Suez connecting Africa and Asia.
environment
The nucleus is found in eukaryotic cells and contains chromosomes. The nucleolus is a lighter area and it contains chromosomes that are 'open' and active. This area is making ribosome subunits. The subunits will move out of the nucleus and assemble into complete ribosomes. They will begin making proteins for cell use.
It is called a plain.
Australia
I think it was Mahabab or Halabja
A large area where crops are grown is called a farm or a field.
A large level area with almost no trees is called a plain or a grassland.
A large mound or raised area of earth is called a hill or mound.
A large area of sand dunes in the desert is called a dune field. A large dune field is called an erg.
An ocean.
a broad area of flat or gently rolling land is called a plain.