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how can natural selection lead to the formation of new species?

How can plate tectonics play a role in this?

There are numerous answers but I would guess that what is being looked for is geographic separation. Imagine a case in which a species of relatively sedentary sea creature lived in a shallow sea along which a plate margin formed so a deep ocean developed and the one shallow sea became two, separated by an uncrossable deep ocean. It is possible that the two populations of creatures that are separated would remain similar and could interbreed if they met later. However, if conditions changed (one plate moving to northerly cold climes, the other to southerly warm ones, for example), the pressures of natural selection on them would cause sufficient changes that they became separate species.

For shallow sea, read terrestrial animals or plants (but probably not all birds that could cross the ocean). And so on.

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Gold plated natural rice dangle earrings Rice Goddess (Thailand) $29.95 Nature is the muse in a stunning design from Thailand’s Danai. Natural rice is plated in 24k gold, creating an elegant contrast with sterling hooks. .925 Sterling silver Please note shape and size of the natural rice may differ.

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