The correct sequence of events is : C,D,B,A.
Iron rich magma in the earth's core heats up because of radiation and the pressure exerted by the other layers of the earth. This heat in the crust trigger convection currents in the mantle. The magma closest to the core will be hotter and therefore less dense than other layers. Being less dense the layer will rise towards the crust, eventually becoming cooler and sinking back down in a circular motion.
The continued circular motion creates electric currents which then generates the magnetic field.
Answer:the advantages of gas is that it helps the vehicles go to the place you want to go to and the disadvantage of gas is that it can start a fire
Explanation:
The advantage of nuclear power is that it helps things function and the disadvantages of nuclear power is that it can explode in the hotness
