What was the driving force behind european imperialism in africa

This are some of the things behind imperialism in Africa.

1) Need for resources,
2) Political competition
3) Technological advances

Economic factors were more of a driving force behind imperialism because the imperialists were in need for natural resources for them to improve their technology and their national pride. 

Water flows along the east coast and across the western tropical pacific towards south america, while they both are directed towards that way,  el niño does not directly affect the southern flow of water along the coast. 

Answer sinking and cooled;