Answer:
convection currents are the result of differential heating
I believe the correct answer from the choices listed above is the last option. All spheres of earth are interrelated or interdependent. This means <span> an impact to one sphere usually affects another one cannot exist without the other. Hope this answers the question. Have a nice day.</span>
At low latitudes, the thermocline is a zone of rapid temperature
over a relatively short depth. it is associated with a similar depth zone marked by a change in density called the pycnocline.