The answer will be the 4th option
<span>The US counties that border Mexico have an unusually high percentage of people in which age group?
A) 0 - 17.
Most of these people are under 18 years of age. They are usually illegal immigrants. Sometimes they are victims of human traffickers.</span>
Answer:
a. The convective circulation in the upper mantle
Explanation:
The engine that powers plate movement is the formation of convective cells within the mantle.
Convection is a heat transfer method usually that occurs within fluids.
The internal heat engine provides a source of temperature that makes part of the mantle to occur in a weak molten form. This is the asthenosphere. Overriding the layer is the lithosphere.
Convection allows for dense and cold lithospheric plate to sink into the asthenosphere and the hot, buoyant asthenosphere rises to the surface to replace it. The alternation between these processes results in mantle convection and eventual plate movement.
There are many alligators in Florida for one reason. This is where their species can survive and prosper. Florida creates a perfect habitat and environment for alligators.
Good Luck! :)
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