What’s countries lie on the Korean Peninsula?

North Korea and South Korea

Explanation:

The Korean Peninsula is made up of the countries of North and South Korea. Initially, Korea was a single country just after the second world war when it was split into two. The Northern part being domiciled by the North Korea and the Southern part flanked by South Korea.

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.