Which artwork has these characteristics? covers floors or walls
is made of tesserae pressed into cement or plaster
has bright colors
shows religious images

Portal in the Northwest Arcades of Friday Mosque in Isfahan, Iran

Byzantine mosaic of Emperor Justinian and his attendants at San Vitale, Ravenna

Detail of Nile Mosaic from the House of the Faun, showing several ducks in water

covers floors or walls

is made of tesserae pressed into cement or plaster

has bright colors

shows religious images

Explanation:

I think the first one..

photography had emerged as an elite art pursued by a few creative individuals for a few wealthy patrons. but now, said bauldelaire, it was succumbing to "the great industrial madness of our times." it was becoming a mass production industry that catered to middle-class tastes, including a taste for gadgetry. the stereoscope, the first 3d imaging system, had turned looking at photographs into parlor entertainment. a "thousand hungry eyes were bending over the peepholes of the stereoscope as though they were the attic-windows of the infinite.

including the octave, the answer would 8 notes in a major scale with one note being played twice. ex) c major scale includes: c, d, e, f, g, a, b, c

notice that c is played twice

however, if you were to ask me how many different notes are in a major scale- the answer would be 7.