What will the average beak depth for finches be after 2 years of average rainfall followed by 3 years of 2 inches of rainfall?. a. About 6 mm. b. About 14 mm. c. About 8 mm. d. About 12 mm

Finches are one species of birds. Their beaks are measured and are said to be correlated with the amount of rainfall the rainforests they live in receive. In this case, when the rain is abundant, small species of finches will thrive because of the small seeds that are able to grow. The average rainfall of US reaches about 9.5 inches hence this value is low. So it is expected for finches with large beaks to live. The answer may be B or D.