Are you talking about this chart? If so, it appears that 30% of military deaths during World War I were Russian deaths.
Answer: A) having a population of more than 60,000 free adult males
This is according to Article 5 in the Northwest Ordinance (July 13, 1787) which says
"And, whenever any of the said States shall have sixty thousand free inhabitants therein, such State shall be admitted".
Answer:
Because of the drought, all the top soil of the land blew away and no crops could be grown, causing the population to move away, and the last was that food was scarce for a while.
Explanation: