What do the pillars represent?

The pillar is the bridge between HEAVEN and EARTH, the vertical axis which both unites and divides these two realms. It is closely connected to the symbolism of the TREE; it also represents stability, and a broken pillar represents death and mortality.

Explanation:

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b

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