Tectonic plate movement is run by convection of mantle currents.
Answer:
1. Litosphere: made of large plates that move.
2. Asthenosphere: plastic portion of the upper mantle of the earth.
3. Outer core: very dense liquid of iron and sulfur.
4. Crust: thin, rigid surface of Earth.
5. Inner core: made of solid iron.
6. Upper mantle: layer that includes the asthenosphere.
7. Lower mantle: layer just outside of the outer core.
By people sailing or drifting from southeast Asia
The answer is b because the other ones are involved in environmental science
