When an object moves in a circle the missing word in this sentence?
of the object is continually changing. What is the

constantly changing its direction

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.

vapour or gas assuming atmospheriv pressure