question: What was Darwin 's response to the claims that certain animals could not have evolved through natural selection ?
answer: Darwin proposed scenarios for the incremental evolution of each feature .
turker_answer: Darwin proposed scenarios for the incremental evolution of each feature as a response to the claims that certain animals could not have evolved through natural selection .
rule-based: Darwin 's response to the claims that certain animals could not have evolved through natural selection was Darwin proposed scenarios for the incremental evolution of each feature .