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.
Answer:
Sailors call the latitudes between 40 and 50 degrees south of the equator the Roaring Forties. ... Warm air moving poleward (on both sides of the equator) is the result of nature trying to reduce the temperature difference between the equator and at the poles created by uneven heating from the sun.
Less children are being born due to increased efforts to lower the CBR (crude birth rate) and improve contraceptive methods. This results in less children being born, meaning that the older people are increasing in dependency (because there's more older people in the older generations vs the newer)
