Hint: Metals are known as good conductors since they can speedily transfer heat, whereas materials like wood, paper, air, and cloth are poor conductors of heat. ... Other materials that are poor conductors of heat are called insulators.
Air may be a bad conductor of heat because its molecules aren't in continuous contact with one another.
Air molecules are too far to disperse heat to at least one another efficiently. Heat is transferred or conducted by molecules and atoms that are very closely bonded together and vibrating at high frequency.
So, the correct answer is “Option B”.
Heat conduction depends on four fundamental factors: the cross section of the materials involved, the temperature gradient, their path length, and therefore the properties of these materials.
A gradient may be a physical quantity that describes during which direction and at what rate the temperature changes during a specific location. Temperature always flows from the most well liked to the coldest source, thanks to the very fact that cold is nothing but the absence of warmth energy.
Air, which features a conduction coefficient of .006, is an exceptional insulator because it's capable of being contained within an indoor space. This is often why artificial insulators make use of air compartments, like double-pane glass windows which are used for cutting heating bills. Basically, they act as buffers against heat loss.