What is the effect of silica when it's in lava?Single choice
A
The greater the amount of silica in the lava, the more viscous it is.
B
The viscosity of lava is not related to how much silica there is in the lava.
C
A lava that has no silica at all will never be able to melt.
D
The greater the amount of silica in a lava, the less viscous it is
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