Why does a banana appear yellow?The yellow light is reflected back to the source of light. The yellow light is reflected back to your eyes. The yellow light is absorbed. The yellow light is transparent, so you can see through it.

take a better picture and ill do it

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.

it takes on an electronical energy