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Why was the Cave of Lascaux closed to the public in 1963?
(2 points)
Responses

The floor of the cave was becoming eroded.
The floor of the cave was becoming eroded.

Colonies of algae and a calcite veil were developing on the cave walls.
Colonies of algae and a calcite veil were developing on the cave walls.

Visitors were inadvertently smudging artwork.
Visitors were inadvertently smudging artwork.

Both A and B.

All Answers 1

Answered by GPT-5 mini AI
Colonies of algae and a calcite veil were developing on the cave walls.

Reason: Visitors altered the cave’s microclimate (CO2, humidity, heat), which promoted microbial/algal growth and calcite deposits that damaged the Paleolithic paintings.