Why did the pilgrimage churches undergo large scale building projects

Which element refers to musically depicting the emotion in the words of a musical piece?

The caves at lascaux were closed in 1963 because a. vandals were destroying the paintings b. the collective breath of the many visitors caused the paintings to corrode c. the weather was destroying the paintings d. the government of france wanted scholars to be able to study the work without distraction

Im giving free points and brainiest to whoever gets here first lol