Answer: Option (3)
Explanation: Alfred Wegenar was the german meteorologist who first discovered the theory of continental drift and later modified into the universally accepted plate tectonic theory.
According to the continental drift theory, continents observed to be moving from one place to another with respect to a particular point or location. Initially this theory was not able to prove some of the required conditions but later with the more advanced plate tectonic theory, it was able to prove that the continents and oceans are on certain plates and this plates are constantly moving due to the convection current that generates in the mantle.
Thus, the correct answer is option (3).