This physical feature has separated ethnic groups in the balkans. 1. iron gate 2. mountains 3. plate tectonics 4. steppes

The answer is B. Mountains.

The answer is b

Mountains have separated ethnic groups in the Balkans

Ithink that it’s mali

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.