What are the subtropical zones? Where are they located approximately? What are the main features of subtropical zones in Russia?

Subtropical zones:

Subtropical zones are natural geographical belts located between the tropical and temperate zones of the Northern and Southern hemispheres (approximately between 30° and 40° N. latitude and 30° and 40° S. latitude).

Subtropical zones in Russia:

In Russia, the subtropical zone is a narrow strip located on the Black Sea coast of the Caucasus and on the southern coast of Crimea. Subtropical areas are found in the Caucasus.