I don't have an answer for you, but I do have an important hint ... one that will
stand you in good stead as you go further in your mathematical studies:
The reason there's a drawing right next to this question in the book or on the
homework sheet is that the question can't be answered without the drawing.
Permian-Triassic extinction
Answer: A large body of water that is partially surrounded by land.
Explanation:
