How did those against slavery act (atlantic slave trade)

The Atlantic slave trade, transatlantic slave trade, or Euro-American slave trade involved the transportation by slave traders of various enslaved African people, mainly to the Americas. The slave trade regularly used the triangular trade route and its Middle Passage, and existed from the 16th to the 19th centuries.

Explanation:

The vast majority of those who were enslaved and transported in the transatlantic slave trade were people from Central and West Africa, who had been sold by other West Africans, or by half-European "merchant princes" to Western European slave traders, who brought them to the Americas. Except for the Portuguese, European slave traders generally did not participate in the raids because life expectancy for Europeans in sub-Saharan Africa was less than one year during the period of the slave trade.

d. it gave farmers a way to organize for more political power