COLUMN A
1.Pangaea
2. Arthur Holmes
3.Alfred Wegener
4.Pohlflucht
5.SONAR
![COLUMN A 1Pangaea 2 Arthur Holmes 3Alfred Wegener 4Pohlflucht 5SONAR class=](https://ph-static.z-dn.net/files/d34/be43df77c32f5491a1315d203904248a.png)