The answer is letter A. evolution always improves organisms. Darwin did not state this idea because he observed that even if evolution happened to species, there were some species that failed to adopt on the new environment. The other choices are his ideas of natural selection which states that an organism can survive if it has heritable traits that can adopt with the environment.
D. Your body stores it as insulin
Hope this helps! I added a second cladogram to help with any confusion because I can see how you got stuck with the first one :)
Stomata allows gas exchange throughout the leaf so your answer is carbon dioxide
: D
