Citing relevant examples discuss four benefits of the concept of environmental possibilism on humanity ​

Migration people get up and go cause they feel it is best for them 

Brand c i think that should be it

Answer( solar wind );

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.