The answer would be theory number one because of how it talks about the fact that only giraffes with longer necks could reach the food and therefore their offspring was also able to survive because of the genetics that were passed down from their parents.
Explanation:
Darwin's theory of natural selection is essentially how quickly and how able the specific organism is able to adapt to its environment by reproducing. Theory one talks about responding to the environment and reproducing while theory number two talks about how eating was the thing that helped them evolve which, though it might be a factor, because without eating, they would have died off long ago, it is not the main reason they they evolved.
