what role does water play in volcanic activity and rock formation?\no a it lowers the viscosity and melting…

what role does water play in volcanic activity and rock formation?\no a it lowers the viscosity and melting point of rock.\no b it solidifies magma upon contact.\no c it cools lava instantly.\no d it increases the hardness of rocks.
Answer
Brief Explanations:
Water in volcanic activity lowers rock's viscosity and melting - point, facilitating magma movement.
Answer:
A. It lowers the viscosity and melting point of rock.