I don't know exactly which three but these could be some... Studying local native traditions and life ways in order to become familiar with the local region Local ecology Observation: reading the landscape Animals: tracking, hunting, trapping, making bow and arrows, animal food preparation Identifying, harvesting and preparing wild edible plants Fire making Tool Making and flint knapping Creating fishing equipment (hooks, lines, etc.), fishing, gutting and preparing fish for cooking Shelter: building using local materials found at the site The waste stream: where to excrete Invisible structures: tribal culture and local tribal custom Hope this helped!
Scientists now know all know that the earthquakes are caused by faults and they look at the ground for this activity, thus means that by doing this they knew more and more of the earth.
