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Why is water called. compound​

Water and protein are compounds because they consist of different types of atom bonded together. Hydrogen, nitrogen and carbon are elements because they each consist of only one type of atom.

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because it's composed of two elements, hydrogen and oxygen. water is technically a molecular compound tho, for it has two hydrogens.

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.