This is a compound-complex sentence.
It means that it contains at least two independent clauses, and at least one dependent clause. As you can see here, there are two independent clauses:
1. We can infer from Aristotle's descriptions
2. but little else is known about him
And there is one dependent clause - that Aesop was a freed slave.
<span>a. Run-on
Example
Auroras illuminate the northern horizon, a greenish glow or sometimes a faint red one.
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<span>A run-on is a phrase, statement or sentence of two or more independent clauses –clauses are independent phrases which has an subject and predicate and, can stand by its own self- that were conjoint or combined together regardless of punctuation. These are also called fused sentences.<span>
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The<span> best replacement for the underlined word is </span>argue. This is because when a critic tells an opinion, the he or she is arguing or opposing to what common people will notice.
Okay so what's the question?