Q: What is the rising and sinking of warm and cooler material called?


Read this paragraph and choose the correct option from the provided answers:

Hot lower mantle material rises upward ( Figure below ). As it rises, it cools. At the top of the mantle it moves horizontally. Over time it becomes cool and dense enough that it sinks. Back at the bottom of the mantle, it travels horizontally. Eventually the material gets to the location where warm mantle material is rising. The rising and sinking of warm and cooler material is called convection .

 Choices:

- depression

- conveyance

- diffusion

- convection


A:
convection