Final answer:
The theory of plate tectonics suggests that about 200 million years ago, all of Earth's land was confined to a single continent called Pangaea.
Step-by-step explanation:
The theory of plate tectonics suggests that about 200 million years ago, all of Earth's land was confined to a single continent called Pangaea. Pangaea was a supercontinent that included all of Earth's continents before they began to break apart and drift to their current positions. The breakup of Pangaea resulted in the formation of separate continents, such as Gondwanaland and Laurasia.
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