Why was the Cave of Lascaux closed to the public in 1963?
The floor of the cave was becoming eroded.
Colonies of algae and a calcite veil were developing on the cave walls.
visitors were inadvertently smudging artwork.
Both A and B.
Both A and B.
The Cave of Lascaux was closed to the public in 1963 because the floor of the cave was becoming eroded, which posed a risk to the integrity of the artwork. Additionally, colonies of algae and a calcite veil were developing on the cave walls, further threatening the preservation of the ancient artwork.