Answer: Stone Polishing Technique.
Explanation: In farm villages in old stone age, apart from the traditional works they developed, such as livestock, pottery and hunting, among others; New works were developed such as the elaboration of stones polishing technique,weapon making, construction of simple structures that served to protect them from the various weather factors. In the same way they opted for itinerant agriculture, which consisted of burning trees so that the remaining ashes of burning, served as fertilizer for the soil in future plantings.