Many bats hunt insects using ______ others, such as some fruit bats, rely mainly on their keen eyesight and sense of smell to find food.
Which choice completes the text so that it conforms to the conventions of Standard English?
echolocation,
echolocation
echolocation;
echolocation: while
Answer: C
"Many bats hunt insects using echolocation" and "others ... rely mainly on their keen eyesight" are both independent clauses. A semicolon correctly joins them. A comma creates a comma splice, and no punctuation creates a run-on.
Choice A creates a comma splice; the commas around "such as some fruit bats" don't change the fact that two independent clauses are being joined.
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