How many different kinds of letters can you think of Please answer in English How is a letter different from an article?List three differences. one two three Will give him 30 points

How many different kinds of letters can you think of Please answer in English How is a letter different from an article?List three differences. one two three Will give him 30 points

1. When you write a letter, you should write the date at first and write your name at last
2. An article has a title but a letter doesn't
3. You should express your personal wishes when writing a letter while you needn't do so when writing an article