As the name says, a descriptive text is one that describes something or someone in detail. This type of text has a large number of adjectives that are used to show the characteristics of what is being described, in addition to showing the details of the description, allowing a mental image to be created in the reader's mind.
The text above gives many details about Jordan, and the location where he is. describing the place and showing all the details and its composition, therefore, we can say that this is a descriptive text.
I think the casket is a symbol of death and it is also a symbol of cruelty of the narrator that he took Doodle to see it and touch it to emphasize that they thought he was going to die so needed to be brought face to face with it.
