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<u><em>Restless tectonic plates move (shift) between one and fifteen centimeters per "YEAR"</em></u>
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<u><em>Tectonic plates move at a moderate around one and fifteen centimeters per year. The plates move in different ways, once in a while crashing into one another.</em></u>
Area a because it experienced a growth from 0 to 15 in 5 years while area b experienced a growth of growth 10
Spore production is the answer