The degree of lightness or darkness of a material is called?

Ben is preparing an essay on the history of art. ben complete the sentence to describe an important development in the history of christian art by ad 1400, a center for christian art. after the protestant reformation began, the catholic church directed artists to specifically promote the values of the 1) a. rome 1) b. venice 1) c. athens 2) a. protestant 2) b. roman catholic 2) c. greek and roman