In the context of the antebellum era, what does colonization refer to?

great britain’s colonization of north america
the relocation of african americans to africa
american colonization of the caribbean
american colonization of africa

The relocation of African Americans to Africa

Explanation:

The Antebellum Era was a period in the history of the southern United States that lasted from the late 18th century until the start of the Civil War.

During that period, in this context, colonization referred to the relocation of African Americans to Africa. This happened because the American Colonization Society aimed to solve the debate of slavery in the US by removing free and enslaved African Americans from the US transporting them into Africa.

Thousands of free blacks were transported into what eventually became Liberia, the vast majority of them were transported against their will because they felt themselves to be Americans.