premise: as the ability of a living thing to survive / to reproduce increases , the likelihood of passing on its traits to its decendents will increase sent2: if a living thing must do something to survive, then doing that something better has a positive impact on that living thing's survival sent3: hunting requires sensing prey sent4: animals require food for survival sent5: an animal is a kind of living thing sent6: hunting is a kind of method for obtaining food sent7: inheriting is when an inherited characteristic is passed from parent to offspring by genetics / dna sent8: hearing is used for sensing sound by animals sent9: senses are passed down from parent to offspring.
hypothesis: the decendants of an animal with better hearing will also have better hearing