Answer:
Option B, Temperature
Explanation:
Viscosity of magma is inversely proportional to its temperature. Thus, the higher the temperature, the lower is the viscosity and thus more rapidly the magma flows. Magma with lower temperature have high viscosity and thus they flow slowly.
high Viscosity = low temperature
low Viscosity = high temperature
Based on temperature lava produced from magma are of two types –
a) Pahoehoe - low viscosity lava
b) Aa - high viscosity lava.
