The three groups of rocks are classified

Answeris associated with sunny,dry weather;

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.

The area of the indian subcontinent is 4.4 million km^2 whereas the usa is  9.8 million  km²