How are Southern Appalachian (U. S. A.) and Southwestern Caucasus (Russia) forests similar?

Question 9 options:

A - They are both Southern Hemisphere deciduous forests.

B - They are both Northern Hemisphere, warm-temperate forests.

C - They are both Northern Hemisphere, boreal forests.

D - They actually share no similarities.

The correct answer is (B) They are both Northern Hemisphere, warm-temperate forests. Although Appalachian (U. S. A.) and Southwestern Caucasus (Russia) have common origins, both northern hemisphere warm-temperature Tertiary forests, they have developed differently. The similarities also include the species-to-genus, species-to-families ratios and the floristic composition.