What is the purpose of the introduction in an essay? i’m stuck between “to explain the main idea to the reader” and “to grab the attention of the reader” leaning towards to explain the main idea to the

Now pick a section from chapter 1 of the call of the wild in which buck is interacting with another character. imagine that section narrated in first person point of view from one of the character's perspective, and rewrite it in the space below, attempting to use a similar writing style as the original author. then, in a second paragraph, consider this: are you able to explore some of the same ideas and themes when viewing the situation from the character's first person point of view, as compared to when it is narrated from london's third-person limited point of view? explain. your response should be be about 150 words in total.