Question

What causes the earth’s magnetic field?

A.
currents in the earth’s liquid-metal outer core

B.
the mineral composition of the earth’s crust

C.
molten material in the mantle

D.
magnetic particles located at the earth’s poles

Answer 1

i think its letter b. the mineral composition of the erath's crust

Answer 2

A. Currents in the earth’s liquid-metal outer core

Hope this helps!