The top few inches of soil high in organic matter that supports plant growth. · topsoil
· subsoil
· slope
· soil triangle

Topsoil

Explanation:

Topsoil is the outermost layer of soil and is the richest in organic material which helps the growth of plants.

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.