These are focused only on a specific component or part of a prevailing megatrend

(a)  

They originated a long time ago but continue to exist and influence people in the present times.

(a)  

fulfills an essential human need

(a)  

refers to the way an emerging trend bends, modifies, or replaces an existing one

(a)  

geared towards the improvement of an old trend

(a)  

embraced by people around the world

(a)  

considered as a tradition by many

(a)  

celebrated for centuries

(a)  

format varies from simple family gatherings to national organized celebrations and exhibitions

(a)