To create cave art during the upper paleolithic period, people mixed yellow and brown from with iron, to make red tones, and created black coloring from manganese or charcoal
a.
alloys
c.
clay
b.
ochers
d.
stones

the ansers is ochers i just took the test

the correct answer for this question is:

it is system invented in 1872 that produced the first illusion of movement. basically it was a disk with a series of drawings around the edge, showing the same object in slightly different poses. when it was spun, it created the illusion of movement.

found this online : )

i think the answer is disc jockeys