Travel, the word itself, invokes a hundred of feelings and memories. For some, travel works like an/a ____and for others, it is a tribulation of unhappy /. Whatever the experience, one thing that has changed / in the new millennium is the trend of holidaying. Earlier, holidays were restricted to the honeymoon season and later a visit to a relative’s home. Nowadays, the / of holidaying has evolved to / the changing trends in the Indian economy.

From the following select the appropriate word to replace  in the above passage.