4 select the correct answer. which transformation requires a complete meltdown of the rock into magma? a…

Brief Explanations:

Igneous rocks are formed from the cooling and solidification of magma. For a sedimentary rock to become an igneous rock, it must first be melted completely into magma and then cool and solidify. Other rock - to - rock transformations like igneous to sedimentary, sedimentary to metamorphic, metamorphic to sedimentary, and igneous to metamorphic do not require complete melting into magma.

Answer:

D. sedimentary rock to igneous rock