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. Only in Liquids and Gases

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.