I want to know the answer to the following question:
What is Darwin's belief about the accumulation of adaptive variations?
All the background I'm provided with is that "Therefore, the first four chapters lay out his case that selection in nature, caused by the struggle for existence, is analogous to the selection of variations under domestication, and that the accumulation of adaptive variations provides a scientifically testable mechanism for evolutionary speciation.". Is that enough to answer the question?
Answer: yes