frogs catch flying insects with their tongues & salamanders catch flying insects with their tongues ->  frogs and salamanders catch flying insects with their tongues  if something is stuck then it can be caught more easily & if somthing is sticky then other things will become stuck to it ->  stickyness can be used for catching things  predators eat prey & eating prey requires catching prey ->  predators must catch prey to eat prey  predators must catch prey to eat prey & a predator is a kind of animal ->  some animals must catch prey to eat  some animals must catch prey to eat & animals must eat to survive ->  some animals must catch prey to survive  stickyness can be used for catching things & some animals must catch prey to survive ->  stickyness can be used for survival by catching things  stickyness can be used for survival by catching things & adaptations are used for survival ->  stickyness is a kind of adaptation for catching things  frogs and salamanders catch flying insects with their tongues & stickyness is a kind of adaptation for catching things -> a sticky tongue is a kind of adaptation for catching flying insects