Which of the following statements is most true regarding this passage on the Dust Bowl?

Answertropical depression;

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.

D. a mountain abd are made by volcanos and tectonic plates