In general, political think tanks in the US do not provide lobbying services directly. They also don't provide and goods or material services that can be used in an economy. They only provide ideas.
The one that was not a major cause for Bantu migration was : B. Slash and burn agriculture
Slash and burn agriculture developed hundred of years after the Era of Bantu civilization
hope this helps
The American Civil War greatly caused a dramatic shift in style, form,
and thematic discourse in American literature because it affected the
people in a way that they question its morality and reality. The works
after the Civil War were mainly focused on how they experienced the war
and its effects. It also sparked some antiwar works and some focused
more on patriotism.
The Atlantic Charter was the document that stated the Allies' war aims, including belief in the four fundamental freedoms (freedom of speech, freedom of worship, freedom from want, freedom from fear) and condemnation of Nazism. It also called for a new association of nations. The Atlantic was made prior to the U.S.'s entry into WWII.
