When so much solute is added that no more will dissolve, what type of solution has been created? need asap

The simplest answer and the correct one is saturated. You can try this at home to see what it looks like. Take a  glass and fill it to the 1/2 full mark. Make sure the water is on the coolish side. Start putting measured amounts of salt in the water. Do this until you see salt on the bottom of the glass. The solution is now saturated.

Empty the glass. Put the same amount of water in the glass but make it much  warmer. Put the same amount of salt in the glass. It should not be saturated -- that is there should be no salt on the bottom.

So temperature determines saturation. But more important, you should get an idea of what saturation is.

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.