Verified Answer :

metchelle

The correct answer that would best complete the given statement above would be option B. MAGNETISM. Amber was used by the Greeks to study MAGNETISM. Amber is a hard, fossilized resin produced by extinct coniferous trees of the Tertiary period. Hope this answer helps you. 

Answer:

C ) Electric charge.

Explanation:  

Amber is used in the experiments related to static electricity.

In electrostatics,  elektron was the word used as a variation to amber, by the Greeks. Amber buttons, when rubbed with cloth, attracted hair.

Studies showed that when amber is rubbed with fur, fur became negatively charged and amber became positively charged. That is because amber loses its electrons to fur.