Anxiety can simply be induce by the unknown. Taking a test, speaking in front of an audience, and flying on a plane for the first time can easily induce anxiety.
If one simply prepares for a test by studying way before the day of the test, then one’s anxiety is greatly reduced, instead of waiting to the last minutes to cram information the night before the test
Regarding public speaking, one can reduce anxiety simply by planning ahead of time by writing an outline, learning the outline and practice speaking in front of people you know, then increase the audience from one to two and so on.
Flying is about changing one’s frame of reference. Someone who fears flying lacks an understanding and knowledge about flying. One’s frame has no reference of the aerodynamic and aviation information; therefore, fear is induced. Unfortunately, avoidance only increases one’s anxiety.
However, when one learns about aircrafts and one is slowly exposed to more airplane trips, one’s anxiety can be reduced. It’s okay to feel fear.