IRON WAS CHEAPIER SO CITIZENS COULD AFFORD IT!
Answer: World War II, also known as the Second World War, was a global war that lasted from 1939 to 1945. The vast majority of the world's countries—including all the great powers—eventually formed two opposing military alliances: the Allies and the Axis. ~Wikipedia
Explanation: WWII was a cruel war. Well, all wars are cruel. This war brought a lot of fear to other nations of families. People lost many of their family members. It was very tragic to lose just brave men and women (nurses). That is why we celebrate it at Memorial Day to honor those who risked their lives for our country.
A higher animal population
hope this helped
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Just look at the picture is a diagram
