"the terms of trade between two countries refer to"

Terms of trade (TOT) refers to the relative price of imports in terms of exports[1] and is defined as the ratio of export prices to import prices.[2] It can be interpreted as the amount of import goods an economy can purchase per unit of export goods.

The reason why reformers connect the abolition and women's rights issues is that the fight for the American African women's rights had also led and influenced women abolitionist to fight for their own rights too. These reformers are people who would want to bring gradual change in the society.