Answer:
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.
- During convection, hot mantle molten rocks rises to the surface as they become lighter.
- Denser crustal rocks are colder and more solid packed, they sink further into the earth.
- This forms a series of convection cells driven by the high temperature of the mantle.
- The cyclic transition between these two plates corresponds to the convection current which carries heat way.
Therefore, the solution is convection current.
When the population is going to increase, the demand of resources like cars, houses, etc is going to increase as well. A lot of trees are going to be cut down to build houses for people. When there’s more transportation materials like cars, the carbon dioxide and greenhouse gases are going to increase as well, causing global warming.
Compass or the North Star lol
Since I do not have the passage i am unable to answer