Answer:
Matching Coastal Lines of Continents
Explanation:
The alignment of coastal lines of different continents helped the early map makers to formulate a thought that continents might have moved. For example, observing the coastlines of western Africa and eastern South American continents suggests the likelihood of this thought. Although taking a closer look at these coastlines, one can observe some irregularities in their alignment, but these irregularities can be explained away by the erosion of these coastal lines over the years.
