What is NOT an example of a way in which the release of greenhouse gases in one ecosystem can
affect bird migration in another ecosystem.
A. Birds may change the time of year in which they migrate.
B. Birds may change the location of their migration if the temperature ranges at either end of their migration
route are no longer suitable.
C. Birds may not migrate at all if they can find an area in which the temperature range is more suitable
throughout the year.
D. Birds generally migrate to the sources of pollution