3 things that make an element reactive

real, smaller and upside-down.   so the answer should be b.

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.

gravitational energy

electrical energy

kinetic energy

ligh energy