Less developed countries (ldcs) have a/ population growth.

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.

Icant awnser the qustion bc u have the planets not listed

The answer is d., a mountain.

Cthat is the answer