There's more than three reasons as to why some scientists think humankind originated in the African continent, some of them are:
- The closest relative to the humans, genetically speaking, is leaving in Africa, that's the chimpanzee.
- The oldest archeological findings of the transitional species of hominid, the Australopithecus, are found in Africa.
- The natural conditions for the needed evolutionary pressure were right in order for the development of the hominids.
Definitely not fishing or service could be manufacturing or timber.
The answer is Manufacturing
Authority is shared between two separate houses and work together to make laws