Which of the following is unimportant for an introduction in formal or academic writing?

1.Entertaining the audience

2.Establishing the key point the piece of writing will make.

3.Discussing your opinion on the topic for at least three sentences.
4.Providing all of the references that you will use throughout the essay

one of these are correct. Help please.

discussing your opinion on the topic for at least three sentence

In formal or academic writing, it is generally important to be focused and concise in the introduction. This means that options 1, 2, and 3 are important aspects that should be included. However, option 4, discussing your opinion on the topic for at least three sentences, is not typically necessary or important for an introduction in formal or academic writing.

To arrive at this answer, you can apply some basic knowledge about the purpose of an introduction in formal or academic writing. The introduction should provide the reader with an overview of what they can expect to find in the essay, including the main point or argument that will be made. It should also grab the reader's attention and establish the context for the topic being discussed. Additionally, providing all of the references used throughout the essay is not typically done in the introduction, as it is more common to include references within the body of the essay itself.