Compare:the emission of photons results in a emission spectrum. Click screenshot and paste the image below the image of the absorption spectrum. How does the emission spectrum of hydrogen compared to its absorption spectrum?

gravity causes stares to cluster i think so

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.