What term would be most useful in explaining the period of rapid cultural progress when humans learned to make stone tools, sew clothes, and paint the walls of rock caves?

In northeast Nigeria Wodaabe women carve gourds into calabashes; most of these are treasured as:

a. ceremonial possessions. b. utensils to hold porridge. c. vessels to carry milk. d. all of these. e. none of these.

The accompanying percussion instrument in this selection is a?

a. ?buzzing quijada b. ?requinto. c. ?guiro (scraper). d. ?pair of sugar canes.