The nutrition label on rice lists the amounts of proteins, carbohydrates, and fats in one serving. these substances are important for human nutrition. how are proteins, carbohydrates, and fats related to the discipline of chemistry? all are chemical compounds. all are found in living things. all are needed for nutrition. all are found in non-living things..

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.