Around 1977, there was a huge drop in finches with small beaks while there was a great increase in large-beaked birds. How can you explain this?
Responses
A The small-beaked birds migrated to another location.The small-beaked birds migrated to another location.
B The larger beaked birds preyed on the smaller beaked birds.The larger beaked birds preyed on the smaller beaked birds.
C Available food changed and the small beaked birds could not readily adapt.Available food changed and the small beaked birds could not readily adapt.
D Competition for food favored large beaks; the small beaked birds died off.