Answer:
It talks about Malaria and AIDS
Answer: The nation claimed Oregon County in the early 1800's are: United States, Great Britain, Spain and Russia.
Explanation:
The correct answer is - the Fertile Crescent.
From what is discovered so far, the place where the first agricultural communities appeared and people started to settle permanently and develop as a civilization, is the so called Fertile Crescent in the Middle East. The fertile Crescent was located between and around (in very close proximity) the rivers of Tigris and Euphrates.