Answer:
The correct answers are "idea; continental drift".
Explanation:
The idea proposed by Alfred Wegener to explain the continental shapes and positions is known as continental drift. In 1912, Alfred Wegener proposed that at some point of history the continents were located into a single protocontinent which he called Pangaea. Wegener proposed that eventually the continents drifted to its current position, reason behind why this theory is known as continental drift.
