The famous scientist Louis Pasteur incorrectly assumed that the process of fermentation was a biological process, not one that was possible using ordinary chemistry. Of course, he was mistaken. One form of protein bridged the biological/chemical divide, allowing processes to take place both within and outside of cells. What are these proteins called, and how do they allow Pasteur to do what he thought was impossible?

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 is stable as it is in group 0 which have full outer shells of electrons

d

explanation: