Which of the following is not a primary reason for human migration? (1 point) better job opportunities political unrest disastrous floods improving knowledge of other cultures

land

explanation:

australia is the flattest continent, and it has vast plains.

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.