Although mark realizes that his behavior is unreasonable, he is so alarmed by high bridges or expressway overpasses that he avoids them by taking an unnecessarily lengthy route to and from work each day. mark appears to suffer from:

Mark appears to suffer from a phobia. A phobia is a high and unjustified fear towards certain situations, which can not be controlled or diminished. This fear affects the daily life of people and generates significant discomfort.

I hope my answer can help you.

In financial aspects, a depression is a sustained, long haul downturn in monetary movement in one or more economies. it is a more extreme monetary downturn than a recession, which is a slowdown in financial action through the span of a typical business cycle. a depression is an irregular and extreme type of recession. so depression is always followed by recession but it is not correct to state that a depression always follow a recession.