Questions

"The reason for playing softly" is not a motive. Motives are the building blocks for large forms composed during the common practice period and, for some, beyond. Composers who used motives would include Beethoven, Mozart, Schubert, Mendelssohn and Brahms.

Therefore the answer for What travels around the world but stays in one spot is STAMP or any other thing that acts as a stamp does.

Ex. the letter in the envelope etc...

Since, Several things have the possibility, but the word travel evokes that it would move. 

Most organic compounds contain carbon and hydrogen.

The amount of money you’ll get for a given amount of your country’s currency is based on internationally determined exchange rates. Exchange rates can be either fixed or floating. Fixed exchange rates use a standard, such as gold or another precious metal, and each unit of currency corresponds to a fixed quantity of that standard that should (theoretically) exist.