Answer:
second answer is volcano
third answer is avalanch
Explanation:
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The answer is a) manganese nodules
Hard to answer when there is no map.
The answer is B) Inca. Extensive road network across plains, deserts and mountains reaching all corners of the empire was one of the notable features of the Inca empire like terraced farming, canals, crop rotation and irrigation as agricultural innovations. It allowed smooth military operations, trading, and the use of runners or chasquis.