How did prehistoric artists create 3d effects?

Natural minor half steps between scale degrees 3 and 4; 7 and 8 harmonic minor half steps between scale degrees 2 and 3; 5 and 6 ascending melodic minor half steps between scale degrees 2 and 3; 5 and 6; 7 and 8 major half steps between scale degrees 2 and 3; 7 and 8

Where does the wood yiri come from? i know it is somewhere in africa but a specific location, . worth 15 points hurry

Symbolic proportion is a. the relative size relationship between religious figures and other part of a work of art. b. the apparent disproportionate relationship between objects within a piece. c. the manipulation of visual characteristics in order to emphasize one specific figure. d. the use of geometric arrangements to show religious imagery or to tell stories. select the best answer from the choices provided