WILL MARK BRAINLEST What does it mean to measure a migration rate? How do migration rates affect populations? Explain your answer in at least two or three sentences.

when the chinese communist party took power in 1949, it began to build new di and levees to hold the yellow and yangtze rivers back.

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.

answer at the divergent plate boundary in the middle of the ocean;