Answer:
It is where horses were domesticated, is the right answer.
Explanation:
The Pontic–Caspian steppe is a part of the Palearctic warm plains, shrub-lands and savannas ecoregion of the temperate grasslands, shrublands and savannas biome. The term Ponto-Caspian area is practiced in bio-geography for animals and plants of these prairies, and mammals from the Caspian, Azov and Black seas. The generative study has recognized this area as the most presumable area where horses were domesticated for the very first time.
