a object to use to write anything such as personal things,preivate things,secrets ,whats happening in your life
The spread of Islam from Mecca to all the other countries around it.That's an example because Contagious Diffusion is The distance-controlled spreading of an idea, innovation, or some other item...
You cite examples. A site is a location. And sight is what your eyes provide.
Your wife or husbsnd cheating on you
flying