Answer: Liquid
Explanation:
Liquid and gases are fluids as they can flow. Convection takes place when the the particles having more energy is replaced with the particles having less energy.
The hotter particles moves and takes place of the colder particles when a liquid is heated. The liquid that lies in the hotter region is less dense than the colder regions. So, less dense particles move to replace the more dense particles.
Hence, the correct answer is Option B
