Which of the following is a characteristic of science? A It asks questions about the natural world.
B It asks questions that cannot be tested.
C It is done by only one scientist at a time.
D It uses opinions to make conclusions.

i have know clue i guess aluminum

i think lol

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.