11.   A falling birth-rate is brought about by a large number of changes in society.

12.   A minority government would represent a change in the political landscape.

13.   A noticeable change in the nature of protest has occurred in recent years.

14.   A rapid increase in population would be a natural corollary of any such changes in the birth control program.

15.   A state politician who also lived in Oak Ridge lobbied for changes in the rules.

16.   A sudden change in water temperature can also be lethal.

17.   A woman who is not ovulating escapes the sharp changes in hormone levels that can lead to mood swings.