In which region of the Earth's interior does the heat increase to the point that rocks can begin to melt? A. stratosphere
B. asthenosphere
C. magnetosphere
D. lithosphere​

B

Explanation:The asthenosphere is the denser, weaker layer beneath the lithospheric mantle. It lies between about 100 kilometers (62 miles) and 410 kilometers (255 miles) beneath Earth's surface. The temperature and pressure of the asthenosphere are so high that rocks soften and partly melt, becoming semi-molten.

i dont know this but ask your teacher for !

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion