However, Alfred Wegener's theory of continental drift began with an observation about the way the shapes of the continents and the continental shelves fit together (LeGrand, 1988).
(Alfred Wegener's theory of continental drift; began; with an observation about the way) (the shapes of the continents and the continental shelves; fit together; )
Alfred Wegener's theory of continental drift the shapes of the continents and the continental shelves
began fit together
with an observation about the way