The two ideas present in the ad are that only the European people are clean, white, pure, and civilized and that's why they were superior to people outside Europe.
Based on this, we can answer the other questions as follows:
It was the political movement that allowed European peoples to invade and dominate regions on other continents. The purpose of imperialism was to exploit natural resources, conquer wealth, and exploit people considered unworthy, uncivilized, and unclean because of their cultures and colors.
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