The correct answer is option D, which states that all of the given options do not conduct electricity. Let's break down each option to understand why it is correct.


Air is a poor conductor of electricity. It is primarily composed of nitrogen, oxygen, carbon dioxide, and other gases. These gases do not have free-moving charged particles, such as electrons, that can carry an electric current. Therefore, air does not conduct electricity.


Plastic is an insulator and does not conduct electricity. It is made up of long chains of polymers, which have tightly bound electrons. These electrons are not free to move and carry an electric current. As a result, plastic does not allow the flow of electricity through it.


Wood is also a poor conductor of electricity. It is mainly composed of cellulose fibers, which do not have free-moving charged particles. The tightly bound electrons in wood prevent the flow of electric current. Therefore, wood does not conduct electricity.


In conclusion, all of the given options (air, plastic, and wood) do not conduct electricity. Air, plastic, and wood are all insulators and do not allow the flow of electric current through them. It is essential to understand the properties of different materials to determine their conductivity and use them safely in various electrical applications.

Explanation:
Electricity is the flow of electrons through a conductive material. In order for a material to conduct electricity, it must have free electrons that can move easily through the material.

Air:
Air is a poor conductor of electricity. It is made up of molecules that do not have free electrons. Therefore, air does not conduct electricity well.

Plastic:
Plastic is an insulator, which means it does not conduct electricity. Insulators have tightly bound electrons that are not able to move freely. This makes it difficult for electric current to flow through them.

Wood:
Wood is also an insulator. Like plastic, wood has tightly bound electrons that do not move easily. Therefore, wood does not conduct electricity.

All of these:
The correct answer is option D, "All of these". Air, plastic, and wood are all insulators and do not conduct electricity.