At divergent plate boundaries in the ocean, magma rises and melts because of
a. higher temperatures at the surface.
b. a decrease in pressure.
c. intrusive plutons at the boundary.
d. increased silica content of magma.

The correct answer for the question that is being presented above is this one: "B. a decrease in pressure." At divergent plate boundaries in the ocean, magma rises and melts because of a decrease in pressure. The magma rises and melts as the divergent plate boundaries in the ocean decreased in pressure.

It is useful for historians to write narratives so that history can be passed on from their point of view.  think about a story being told in third person, then think about it again being told in first person, by someone who actually experienced the event.

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