The best answer is:
The moisture from the presence of tourists and from the air-conditioning unit started to destroy the paintings with mold.
Choose the best answer.
What is the reasoning behind the closure of the Lascaux Caves?
The moisture from the presence of tourists and from the air-conditioning unit started to destroy the paintings with mold.
There were several tourists who insisted on taking a "souvenir" from the cave which started to destroy the art.
The heat from the record breaking summer temperatures began to damage the cave walls.
The moisture from the natural humidity in the air started to cause damage to the art.
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