Which of the following agricultural techniques requires more and more land to be cleared every two years due to soil exhaustion? swidden agriculture terraced farming wet rice agriculture dry rice agriculture

answer; they use longitude and latitude and   global grid system; good luck

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.