A human body can fit this criteria.
A salt solution.
Any ionic substance that has been dissolved in water.
Some very good conductor's are copper, water, metals, trees and there may be a few more. And believe it or not our bodies are also very good conductors because our bodies are made up of mostly water.
keep heat in copper is a good heat conductor.
If by energy you mean electricity, I would think that most fruits conduct electricity in that most fruits are mostly made of water, and water with impurities (e.g. little bits of fruit!) is an excellent conductor of electricity.
Very pure distilled water is a good conductor of heat but is not so good for electricity and it is not a metal. Oil is a good conductor of heat but not of electricity and it is not a metal. Teflon (a non-stick coating used on cooking pans) is a good conductor of heat but not of electricity and it is not a metal.
Earth is covered mostly in water, but is not made up mostly of water. Most of earth is made of rock.
theprotoplasm of a cell is mostly made up of water.
It's made of steel with a coating of nickel, so it is a conductor but not as good as the old coins with copper in.
The earth is mostly made of water because the world is water with land.
It is a conductor, I'm pretty sure.
both. most are conductors but some now made today are insulators which are mostly used in carpentry. but common nails are conductors.give me trust point? (:Conductor as they are made from metal.