Answer:
A) Melting of metamorphic rock into magma
Step-by-step explanation:
Point 1 is hot and molten. It represents magma.
Point 8 has somewhat of a band structure. It represents a metamorphic rock.
Then, point 9 must represent the melting of metamorphic rock into magma.
B) is wrong. Point 6 represents sedimentary rock, which has sandy or clay-like layers .
C) is wrong. Point 2 represents the crystallization of magma.