Question

why does it occur in semi-molten state​

Answer 1

Answer:

May be it helps you

Explanation:

The asthenosphere is the denser, weaker layer beneath the lithospheric mantle. ... The temperature and pressure of the asthenosphere are so high that rocks soften and partly melt, becoming semi-molten. The asthenosphere is much more ductile than either the lithosphere or lower mantle

Answer 2

The semi molten material is reffered to as magma. The high temperatures in this area is what makes the material to be semimolten in nature. In the centre of the earth is a metal core that is hot and dense, this is what causes thge materias underneath the crust molten in nature.