What role does the battery play in this circuit design? A) The battery works as the system's wires. B) The battery is the electrical power supply.
C) The battery is the circuit's main conductor.
D) The battery works as the system's electrical switch.

layer a is the exosphere and layer b is the thermosphere.   is the answer i think but i hope this .

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

more than, less

less than, more