Answer:
The main motive for imperialism was to obtain and control a supply of raw materials for industries. This meant that a weaker country with abundant natural resources would be colonised. Imperialists were often brutal in the way they treated the indigenous population.
Explanation:
poltical and economic isolation
It would be "Polynesia" that was a region of Oceania greatly affected by European colonization, forced slavery, and deadly diseases, since this territory was highly advantageous for countries looking to increase production and expand their empires.