The correct option is The mega-ocean surrounding the super continent.
Explanation
Alfred Wegener, a German meteorologist, proposed the Continental Drift Theory in 1912. He postulated that all present-day continents were once united as a single landmass surrounded by a vast ocean.
Detailed Analysis:
- Pangea: This term refers to the supercontinent, meaning "all earth." It consisted of all the landmasses joined together.
- Panthalassa: This term refers to the mega-ocean that surrounded Pangea, meaning "all water." It covered the remainder of the Earth's surface.
- Laurasia and Gondwanaland: Around 200 million years ago, Pangea began to break apart into two large continental masses. The northern part is referred to as Laurasia (or Angaraland), and the southern part is known as Gondwanaland.
Key Takeaway: In the context of Continental Drift Theory, Pangea is the single supercontinent, while Panthalassa is the universal ocean surrounding it.