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The features of a letter include a greeting and the body of the letter. It may also contain the date the letter was written and a conclusion.
A seasonal greeting is a greeting apropos to the season, e.g., Merry Christmas, Happy Easter, Happy Independence Day, etc.
To write a business letter of any type, use business format. Start with your address in the top right (without your name). Skip a line and put the name and address of the person you are writing to starting at the margin on the left. Skip a line and write a business greeting with a colon after it. Write a short introduction, the instructions, and a conclusion. Write a business salutation, leave a few lines, and type your name. Sign your name between the salutation and the typed name.
There are several companies that specialize in printing greeting cards, such as Moonpig. Similarly, other webpages, such as Funky Pigeon offer greeting cards.
Greeting cards are sold in nearly every city. Some stores that sell greeting cards are Hallmark, American Greetings, and local grocery stores.
Introduction is to conclusion as greeting is to a goodbye.
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The youthful...: Introduction
The opposite of introduction is conclusion or ending.
greeting
Introduction is the paragraph(s) that starts a text, conclusion is the paragraph(s) that ends a text.
Conclusion.
The paragraph(s) between the introduction and conclusion are called body paragraph(s).
introduction that provides background for the reader
That would be 'introduction'.
Introduction