I'm sure it's the Tropical forest.
Hope this helps!
Answer:
Berlin Conference
Explanation:
Berlin Conference of 1884–1885 Meeting at which the major European powers negotiated and formalized claims to territory in Africa; also called the Berlin West Africa Conference.
source: oxford reference
The United States Constitution can be changed informally. Informal amendments mean that the Constitution does not specifically list these processes as forms of amending the Constitution, but because of change in society or judicial review changed the rule of law de facto.