Access to clean water and sanitation are important factors in a population's general health and well-being

This is true, if this is the whole question

Its tru, say that out louud!

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.

Ithink the answer is either a , c or d