The purpose of this passage is:
This refers to the aim and reason which an author writes a text and the things which he wants his readers to learn from the text.
With this in mind, we can see that from the complete text, there is the narration of UFOs which are Unidentified Flying Objects which are popularly known as aliens and the text purpose is to inform.
Read more about text purpose here:
https://brainly.com/question/2289953