Anonmetal:
is more likely than a metal to attract an electron
is more likely than a metal to lose an electron
requires more energy than a metal to lose an electron
requires less energy than a metal to lose an electron

A non-metal is more likely than a metal to attract an electron and it requires more energy than a metal to lose an electron.

Explanation: There are 3 types of elements in a periodic table:

1) Metals: These elements easily loose electrons and forms cations. They require less energy to loose electrons because electrons are loosely bound to the nucleus.

2) Non-metals: These elements easily gain electrons to form an anion. They require more energy to loose electrons because the electrons are tightly bound to the nucleus.

3) Metalloids: These elements show both the property of metals and non-metals.

From the given information above, we conclude that a non-metal is more likely than a metal to attract an electron and it requires more energy than a metal to lose an electron.

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.