Some of the earliest work on was conducted by faraday.

a. electricity
b. magnetism
c. electromagnetism
d. magnetic levitation

C

Explanation:

Michael Faraday FRS was an English scientist who contributed to the study of electromagnetism and electrochemistry.

the cellphone, they would then know if the killer would have contacted them or always hated them. or if it was a breakup. but if that is not the case, then it would be the clothing. to put in a bullet, it would have to be put in by hands. hands have finger prints which, would have giving you the answer of who done it.

explanation:

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.