Answer:

1. internal structure of the earth

2. internal structure of the earth

3. internal structure of the earth

4. plate tectonic theory

5. plate tectonic theory

6. convention current

7. convention current

8. convection current

9. internal structure of the earth

10. seafloor spreading theory

11. plate tectonic theory

12. continental drift theory

13. seafloor spreading theory

14. plate tectonic theory

15. plate tectonic theory

Explanation:

sub to technoblade