The explosive force of a volcanic eruption depends on the type of magma in the magma chamber. The type of magma depends on its . viscosity, gas content, and silica content
gas, silica, and water vapor content
gas content, silica content, and pressure
viscosity, temperature, and water vapor content

The last one.

Explanation:

The last one is most plausible. The viscosity, temperature, pressure, and water vapor content all contribute to its type.

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an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme