How were the incan people able to build their empire in such challenging geography?

Each of the cultures that settled the area, however, learned to adapt to their environment. In doing so they made scientific advances. In the steep mountains, people made terraces for farming. On the coast, they developed irrigation systems so they could farm in the desert. As a result, farming could support large populations both on the coast and in the highlands, where they built cities a full two miles above sea level.

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answer; ///i believe that the correct answer is ; hieroglyphs or glyphs; the maya script, also known as maya glyphs, was the writing system of the maya civilization of mesoamerica; as always plz check first..good luck

the correct answer is d. the monetary reserve is a set of funds represented in currency, money or similar, saved as a forecast of possible needs or for legal reasons.

the increase or decrease in the monetary base influences in the increase or decrease of the inflation rate. therefore, the excess of monetary reserve will cause the reduction of inflation.