Name a man made fabric invented in the past 25 years and a credible use.

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

Which of these forms or genres appeared in the baroque period, but  not  previous periods?

What is one of the most effective ways that artists create space in two dimensional art?