A certain element exists at room temperature as a dense solid with high luster. When tested, it conducts both heat and electricity well. This element is most likely
classified as -​

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

it is the most commonly accepted one

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.