Respuesta :
Answer: Option (d) is the correct answer.
Explanation:
Substances whose conductivity lies between the conductivity of conductors and insulators are known as semi-conductors.
For example, silicon, germanium etc are good semi-conductors.
Whereas conductors are the substances which act as good conductors of electricity.
For example, metals are good conductors.
On the other hand, insulators are the conductors that resist the flow of electric current.
For example, non-metals are bad conductors of heat and electricity.
Thus, we can conclude that semi-conductors can best be described as materials that have insulator and conductor properties.
