A motif is a recurring theme or element.
Answer:
Both passages use evidence to develop the claim that the general public needed to know about the terrors of involuntary servitude.
Explanation: It is difficult to say for sure because everything is run together. It is difficult to see where the first article ends and the second one begins.
The following sentence, however, could support the choice: Both passages use evidence to develop the claim that the general public needed to know about the terrors of involuntary servitude.
"it also gave the antislavery forces an opportunity. If they could reverse the flow—make the horrors of slavery visible to those who benefited from it—they might be able to end the vile practice forever."
Together with the part about Equanio's memoir, there is support for this choice.
Sorry, i can't be more helpful.
Another possibility:
Both passages use evidence to show that knowledge of the extreme brutality of the sugar trade changed viewpoints about enslavement. Support: It seems that the early section "In the Age of Sugar, when slavery was more brutal than ever." and "Clarkson brandished whips and handcuffs used on slaves; he published testimonials from sailors and ship doctors who described the atrocities and punishments on slave ships." from the end support this possibility-- but THIS passage does not say that viewpoints have changed.
Answer:
the answer is the last sentence
