B. population of the region
Answer:
The date marking the end of prehistory is typically defined as the contemporary Written historical record for example in Egypt it is generally accepted that pre history ended around 3200 BCE
<span>Answer: persons consumption of the good does not leave less for others to consume ( non rivulrouse consumption)
2 joint consumption- we can all consume at the same time
3 consumers strategically do not pay producers for their output because of chronic free riding.
4 once it is produced it is not economically viable to exlude the free rider.</span>