Answer the following question given this paragraph: Wallace's paper on evolution confirmed Darwin's ideas. It also pushed him to publish his book, On the Origin of Species. The book clearly spells out his theory. It also provides evidence and logic to support it. Q: On the origin of species is a book by darwin that spells out what theory? Choices: - theory of reproduction - theory of the universe - theory of the computation - theory of evolution A:
Answer:
theory of evolution