It is clear that humans during the Upper Paleolithic period used lamps for light in caves. ██████ █████ ███ ██ █████ ██ ███ ██████ █████ ████████████ ███ ████████████ ██ █████ █████ ████ ███ ██████ ██ ███████ ████ ███ ████████ ██████ █████ ██████████ ████ ███ ████ █████ ███████████ ███████ ████ ███ ███████████ ███████ ███ █████████
Why is the later portion of the Upper Paleolithic period, when the Magdalenian culture was dominant, associated with a much higher number of lamps than earlier in the Upper Paleolithic period?
This is an EXCEPT question. The four wrong answers should tells us about a difference between the late Upper Paleolithic and the earlier parts of the Upper Paleolithic that could lead to a greater number of lamps being associated with the late period.
Each of the following, if █████ ███████████ ██ ██ ███████████ ██ ███ ██████ ████████████ ██ █████ ███████
Artifacts from early ██ ███ █████ ███████████ ██████ ███ ██████ ██ ████████ ████ █████ ████ ██████████ █████ ██ ███ ███████
More archaeological sites ████ ████ ██████████ ████ ███ ███████████ ███████ ████ ████ ███████ █████████
More efficient lamp-making ██████████ ████ █████████ ██ ███ ███████████ ███████ ████ ██ ███████ █████████
Fire pits were ████ ████ ██████ ██ █████ █████ ██ ███ █████ ███████████ ██████ ████ ████ ████ █████ ██ ████ ███████
More kinds of █████ ████ ████████ ██ ███ ███████████ ███████ ████ ██ ███████ █████████