What business factor makes it difficult for companies to manage forests sustainably?

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.

Idk bro sorry  lava is hotter then magma but im  not sure about it alll

Iwould say the answer is d