What shared aspects of the caves at lascaux and the catacombs in rome indicate that these places were sacred to those who used them?

The location (in caves)

Explanation:

Caves are places that offer protection and shelter but they can also imprison, naturally-formed caves, such as that at Lascaux in France or the catacombs in Rome were both location used to celebrate, the case of the Lascaux in France art was celebrated and in the case of the catacombs in Rome, funerals were celebrated.

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They both have paintings tracing to the Christian religion

Explanation:

The lascaux cave, in dordogne region of southwestern France was discovered by 18 yr old Marcel Ravidat in September, 1940. Here beautiful paintings said to be about 20000 years old were discovered. The Roman catacombs in the same regard are underground burial grounds where most Roman religious people were buried. Paintings of Christian resemblance were discovered here and also in the Lascaux caves

based on the images pictured above, the major difference between the two cathedrals: the cathedral of notre dame and the amiens cathedral, is that the cathedral of notre dame emphasizes the horizontal lines while the amiens cathedral emphasizes the vertical lines.