Just like word choice, writers<span> should strive to vary their </span>sentence<span> structure to create rhythmic prose and keep their reader interested. </span>Sentences<span> that require a variation often repeat subjects, lengths, or types.
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The claim refers to the assertion of something commonly without proof or evidence.
When writing an essay claims are generally made out of cultural common knowledge which is shared with the readers. An essay consisting of just common knowledge doesn't attract readers or interest them by stating what is obvious.
When providing a claim evidence is necessary which asserts "how do you know?"
Hence in the above claim, evidence which best supports is many animals die prematurely in zoos because they are exposed to infectious diseases.
As the claim declares the condition of the zoo for improving health conditions and safety. Due to unhealthy conditions animals die prematurely due to infections and diseases.
It could be C. because a personal website will be biased based on the creators pov.