Answer:
Step-by-step explanation:
(a) It is called conductors.
The conductors are the materials which can allow the current to pass through it.
(b) The example of conductor is copper, iron, etc.
The best conductor of electricity is silver.
(c) The example of semiconductor is silicon, germanium, etc.
The semiconductors are the materials which are insulators at normal temperature, but if the temperature increases, the conductivity of semiconductor increases.
(d) An example of insulator is wood.
Insulators are the materials which do not allow the current to pass through them.