Colonialism: Colonialism refers to the practice where one country extends its control over another country or region for economic exploitation or political dominance.
Imperialism: Imperialism is an ideology where powerful nations seek to expand their territories and exert influence over weaker nations through economic or military means.
Assimilation: Assimilation occurs when one culture absorbs another culture's practices and beliefs until they become indistinguishable from each other. In this case, it could refer to attempts to make Maoris adopt British customs and way of life.