Given the task definition and input, reply with output. Given a scientific passage and an answer, generate a question for the given answer.

Passage: The Galapagos Islands are a group of 16 volcanic islands 600 miles off the west coast of South America. The islands are famous for their many species found nowhere else. It was on these islands where Darwin began to develop his theory of evolution. Answer: south america
The galapagos islands are a group of 16 volcanic islands 600 miles off the west coast of what continent?