Hey KamronkIng !
The reason Lascaux was closed in 1963 was because a lot of people breath and it made the paintings to corrode. Meaning to ruin the paintings. So they had to close to prevent from the paintings to be destroyed.
I hope I was able to help you out ! :D
I just learned this you have to give up something to do something like going to school.you could be sleeping at work or even playing video games but you rather go to school.that is an opportunity cost you give up one thing for the other plz mark as brainliest<span />