The correct answer is Incas. Out of the famous South and Central American tribes, the Zapotec, the Maya, and the Aztecs lived in what is today's Mexico, while the Incas lived further south, mostly in Peru and around that area. Mexico had these three and some more, but these were the most famous, among other things for their monumental buildings that can still be found today.
Stalactites are chemical sedimentary rocks that form when the minerals in the cave are left behind by the water. They saturate and form into these stalactites.
