Answer: Option (e) is the correct answer.
Explanation:
Convection is defined as the process in which a fluid (liquid or gas) when heated then more dense (cooler) substance sinks at the bottom whereas less dense (hotter) substance will rises at the top. Â
This intermixing of the substances tends to generate convection currents and this process is known as convection.
Since, particles in a solid are strongly held together due to which they are unable to move from their initial position.
Thus, we can conclude that the statement molecules in a solid are not free to move throughout its volume best explains why convection doesn't occur in solids.