Answer-
1.It goes from higher authority to its subordinates.
2.It includes notices ,orders ,job sheets ,handbooks etc
3.It is based on the assumption of authority.
4.It is also known as downstream comminication
5.It uses both oral and written comminication.
6.Managers must encourage subordinates to talk freely.
7.It strengthens the structure of authority.
8.It educates and trains employee and improves their skills and knowledge .