What two seasons does the savanna and the tundra have

Winter and summer :) 
Good luck

Summer and Winter, aka two extremes. It's either super cold or super hot.

The answer to your question is b i think

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.