Mayan architects used available materials that were local to them like limestone and sandstone which were found in Palenque and Tikal.
I'm unsure if this is what you're looking for because you didn't supply any options but hopefully I helped!
bartering of goods for each other
Explanation:
After the decline of the Indus valley civilization, Vedic age started in the Indian history. Generally dated, between 1500-600 B.C. as most of the modern scholars agree on this date. References point to the use of barter system and metallic currency in that age. In the Vedic Age, the cow stood as a higher unit of barter and cowrie-shells were used for lower purchase
In 1668 AD newton invented telescope
