Assume that Krakatoa is relocated to a tectonic setting where two continental plates collide instead of one subducting beneath another. Which volcanic outcome is most likely?

At Krakatoa’s current setting, one plate subducts beneath another, carrying water into the mantle and helping it melt to produce magma. In a continental-continental collision, neither plate typically sinks far enough to supply that water, so the main subduction-related mechanism for melting is absent. Therefore, magma production—and likely volcanic activity—is suppressed; choice B is correct.

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