premise: frogs catch flying insects with their tongues sent2: a predator is a kind of animal sent3: predators eat prey sent4: animals must eat to survive sent5: adaptations are used for survival sent6: eating prey requires catching prey sent7: if something is stuck then it can be caught more easily sent8: if somthing is sticky then other things will become stuck to it sent9: salamanders catch flying insects with their tongues.
hypothesis: a sticky tongue is a kind of adaptation for catching flying insects