Which events have caused political unrest in the countries of the tropical north since they gained independance. select all that apply.-issues related to slavery-border disputes-military groups overthrowing civilian leaders-crop disputes

The correct answers would be the second and third one

Issues related to slavery Border disputes Military groups overthrowing civilian leaders

Explanation:

The various events that have caused the political unrest in the world are related to the border disputes and the actions taken by the military and the various impacts of the separatist groups. These are formed by the event that has led to the slavery and the northern tropics like the military alliances and the overthrowing of the civilian leaders like that if the middle east such as the Arab springs and the Mexican regions.

Bcold,less-dense air falls