What is a grotto?
a. a garden in front of the churches
b. a recess typically made of irregular stones and covered with artificial foliage
c. a stone pathway leading to the back of the nave of the church
d. none of the above

I think the answer is b

Explanation:

i am in art and took the test

b. a recess typically made of irregular stones and covered with artificial foliage

Explanation:

A grotto is an artificial recess or structure made of irregular stones and covered with artificial foliage that make it look like a natural cave. It is mostly found in parks, outdoor gardens or near waters and is sometimes used to place statues of saints where people can go to pray to. In antiquity, for example, a grotto was seen as a dwelling place of divinities.

lithograph is created by etching the flat surface of a print.