(A) Militarism
(B) Alliances
(C) ** Imperialism
(D) Nationalism
EXPLANATIONS BELOW
Concept note-1: -The concept of colonialism is closely linked to that of imperialism, which is the policy or ethos of using power and influence to control another nation or people that underlies colonialism.
Concept note-2: -How did imperialism increase tensions among European nations? What is imperialism? The competition for oversea empires created a sense of rivalry and mistrust of one another. The nations of Europe competed fiercely for colonies in Africa and Asia.
Concept note-3: -Colonies not only provided sources of valuable raw materials (diamonds, gold, timber, oil, rubber, and many others) for the imperial power, their populations served as markets for the industrial products made in the home country.
Concept note-4: -Others use the term colonialism to describe dependencies that are directly governed by a foreign nation and contrast this with imperialism, which involves indirect forms of domination. Like colonialism, imperialism also involves political and economic control over a dependent territory.