Which layer of the Earth is primarily composed of molten rock?
A
Crust
B
Mantle
C
Inner core
D
Outer core
Correct Answer: Option B — Mantle
Explanation:
The mantle, located beneath Earth's crust, consists largely of semi-molten rock called magma that flows slowly over geological time. This movement drives plate tectonics, contributing to earthquakes, volcanic activity, and continental drift.