When denser materials replace lighter material, we refer to this as A. Conduction current
B. Convection current
C. Continental drift
D. Continental Crust
E. Body wave

B. Convection current

Explanation:

When denser materials replace lighter materials, it is called convection current.

This is one of the driving mechanism of the plate motion between the crust and the mantle.

Therefore, the solution is convection current.

answercharacteristics of place include things like economic activity, architecture,and culture,all of which are human elements that alter or can be influenced by the environment;