Answer:
America wanted not just to contain communism - they also wanted to prevent the domino effect. Truman was worried that if Korea fell, the next country to fall would be Japan, which was very important for American trade. This was probably the most important reason for America's involvement in the war.
The diversity of birds helps them survive by the differences in their beaks the different shapes and sizes means they all eat different food therefore that is not an issue. Different coloration is not an issue due to the species separating from each other. The diversity keeps the birds alive by signifying differences.
Hope this helps!
Henry II: Father of the Common Law
Franklin D. Roosevelt was the 32nd president of the United States.