PLease help me quickly. This is for a test I'm currently taking. I will give brainliest

Rank the following from most to least devasting: ordovician,permaian,cretaceous, pleistocene

Lots of points: economics: the dollar value consists of all of the goods and services sold by of each of the following entities except: a. government b. consumers c. unemployed d. net exports

How was south asia worked to meet the needs of its largest populationchoose all that are correct a) by implementing the green revolution b) by putting the dalits to work c) by developing cottage industries d) by doing outsourcing for other countries