Question

who to write a letter? explain?

Answer 1

are you asking whom to write letter
toh bhai letter toh kisi ko bhi likh sakte like to
ur relatives, principal, editor of newspaper etc etc

Answer 2

You can write letter to anyone example:EDITOR,YOUR RELATIVE,FRIEND,etc
Letters.are of two type
Formal and. Informal
Formal letter are written to offices
Informal letter are written to friends and relatives.
Hope it is helpful
=SHAHIN