Heat transfer by convection takes place:

a. in all matter

b. only in liquids and gases

c. only in solids

d. only in water

B. Liquids and gasses

Explanation:

In liquids and gases, convection is usually the most efficient way to transfer heat. Convection occurs when warmer areas of a liquid or gas rise to cooler areas in the liquid or gas. As this happens, cooler liquid or gas takes the place of the warmer areas which have risen higher.

B. Only in Liquids and Gases