A grass land is a healthy green grass environment were it isnt very hot or dry.butb a savvanah has lots of heat so the grass dries up and dies
It was believed that the magnetic field to be generated deep down in the Earth's core. But the truth is the flow of liquid iron generates electric currents, which produces magnetic fields.
But the truth is no one really knows for certain so the only thing we know is that the spin of the earth is the cause of its magnetic field
Hope this helped :)
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