What helped lead to the balkanization of the Balkan Peninsula

Here is a picture  of the net. its 4 squares in a row diagonal and on the third draw one square aove and under

Answergoogle earth; i believe this is the correct answer, plz check first;

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.