The theme that's illustrated is the abilition of slave trade by giving information about its negative effect.
<h3>What is a theme?</h3>
It should be noted that a theme simply means the underlying message that can be illustrated in a story by the author.
In this case, the theme that's illustrated is the abilition of slave trade by giving information about its negative effect. This is the reason for the autobiography.
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Answer: a
Explanation: trust me a smart human hehe
