Plants need nitrogen to produce amino acids, which make proteins
1. Humanitarian Aid
2. Military Aid
3. State Department
B.) <span>A species that influences the survival of many other species in an ecosystem is called a "Keystone Species" example. "Jaguar"
Hope this helps!</span>
It was during the Cold War era that two economic philosophies were predominant: Capitalism and communism--with the United States advocating for the former and the USSR advocating for the latter.