Final answer:
Pre-Darwin evolutionary thought includes ideas from ancient Greeks and thinkers like Lamarck, Lyell, and Malthus, and Darwin's theory expanded on these ideas.
Step-by-step explanation:
Pre-Darwin evolutionary thought was the idea that species can change over time and that some ancient Greeks and thinkers like Jean-Baptiste Lamarck, Charles Lyell, and Thomas Malthus proposed this before Darwin's theory of evolution by natural selection. Lamarck believed in the inheritance of acquired characteristics, Lyell argued for gradual geological processes shaping Earth's surface, and Malthus described how populations grow faster than their resources. Darwin's theory, published in 1859, expanded on these ideas and provided convincing arguments and evidence to support them.