Question

What is letter and it's type

Answer 1

letter is a kind of written information about anything and a way of communicating between people.
this of 2 types
1: formal for official purpose
2: informal for any unofficial purpose

Answer 2

letter is a which used in show problm,complaint,information etc to other people
it's two type
-formal (used for office,school &etc)
-informal(used for friend,relatives &etc)