Answer:
What makes an introduction strong is 2) including a brief background of the topic, 3) setting up the essay and preparing the reader for the points to be made and 4) giving a clear statement describing what the essay is about.
Step-by-step explanation:
The introduction of an essay is found at the beginning of the text. Therefore, a strong introduction must catch the reader's attention from the start by using a formal tone and language and giving background information about the topic that is going to be discussed. Moreover, the writer of the essay must include information closely related to the one that the text will offer in the following paragraphs and add a well-written thesis statement that expresses the main idea of the essay.