Use the Following Graph and Information to Answer the Question

Multiple Choice

Use the following graph and information to answer the question below.
Flycatcher birds that migrate from Africa to Europe feed their nestlings a diet that is almost exclusively moth cat The graph shows the mean dates of arrival, bird hatching, and peak caterpillar season for the years 1980 and 200

What is the shift in the peak of caterpillar season most likely due to?

A) acid precipitation in Europe
B) earlier migration returns of flycatchers
C) an innate change in the biological clock of the caterpillars
D) pesticide use
E) global warming