Answer:
The behavioral change for the avoidance of guppies from predators. This natural selection leads to the structural change in male guppies.
Step-by-step explanation:
- The large bright spots on the male guppies are used to attract the females for the mating.
- But a predator which detect guppies by sight can easily sense them and hunt them.
- For their survival, the trait of large, bright spots on the male guppies was changed.
- This change leads to their less chances to be hunted by the predators.
- Hence this is a behavioral change for their survival.