Six runners compete in the 100-meter hurdle event by each jumping 10 hurdles, one at a time. (Runners must jump the hurdles in his or her lane.)
Would we use this as an analogy for a series circuit, a parallel circuit, or both?
Why?

i'm assuming that it's c.) red bank..

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.