What is the purpose of the descriptive detail in this
passage from travels with charley?
in due time, specifications came through, for a tough, fast.
comfortable vehicle, mounting a camper top- a little house
with double bed, a four-burner stove, a heater, refrigerator
and lights operating on butane, a chemical toilet, closet
space, storage space windows screened against insects -
exactly what i wanted.
it shows that the author has a lot of money to buy a
fancy camper.
nit shows that the author is a very fussy person
it shows how the camper meets all the author's travel
needs.
it shows that the author is a good designer
mark thus and return
save and exit
sure

It shows that the camper meets all the author's travel needs.

Explanation:

The description of the camper in this passage is mainly to reinforce the utility of the vehicle. Every aspect of the design that is mentioned is practical and would a specific use on the road.

The author may be fussy, but ordering a specialized camper is not an indication of that. It is also unlikely that the author designed the camper since the specifications were sent to him.

It shows how the camper meets all the author’s travel needs. is my best guess.

faith or loyalty when pledged in a solemn agreement or undertaking.

it provides a unique and personal perspective on a significant historical event.