Wagner observed the coastlines and continents in the southern hemisphere has similar grooves which of the following supports coastlines far away from one another having similar Grooves

Answer

The Continental drift

Explanation

From a geographical perspective, the evidence is that Africa and South America might have been a single mass of land due to similar coastal alignment. In addition to that, there is similarity in mountain ranges of Buenos Aires in Argentina to those mountains in South Africa. These mountain ranges have same age and were formed by similar rocks.