<span>planning of cities jewelry pottery Sanskrit religious art temples paintings sculptures stories plays poetry metal lurgy-the art of working with metal knew how to make alloysHindu-Arabic Numerals (still in use today)medicine inoculation-putting a small dose of a virus into someone to build a defense to disease <span>astronomy</span></span>
Population density is the number of people that live in a region, divided by a specific measurement such as square miles or square kilometers.
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Answer:
Digestive system and Skeleton system.
