Answer :
Final answer:
The Inca civilization developed several significant systems and inventions including the 'quipus' - a unique communication and record-keeping system, a well-planned road system, a communal work requirement system known as 'mita', and unique farming techniques including terraced farming.
Explanation:
The Incas, a highly developed and complex society that existed in South America, created many inventions and systems that we still use today. Notably, they developed a unique communication and record-keeping system known as quipus, which consisted of a number of knotted strings. Each of these knots and strings represented distinct meanings intelligible to those educated in their significance, thereby replacing the need for a written system.
The Incas also displayed significant engineering skills - they were expert stonemasons and built an extensive road system that rivaled that of the Romans. They cleverly constructed these roads to ascend and descend the steep slopes of the Andes, thereby efficiently connecting their sprawling empire.
Additionally, they devised a communal work requirement system known as the mita. Under this system, each peasant worked on public works projects for a number of days per month for the Inca ruler. This helped in the efficient management of resources, similar to how our current welfare systems work.
Lastly, Incan farming techniques, particularly their terraced farming system on steep mountains, continue to influence modern agricultural practices
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