Final answer:
The correct way to revise the sentence is 'Tara loves the beach, but sometimes she is stung by jellyfish,' as it correctly uses the coordinating conjunction 'but' to connect two independent clauses and show contrast without creating a comma splice.
Step-by-step explanation:
In the sentence, "Tara loves the beach, sometimes she is stung by jellyfish," the correct revision using a comma and a coordinating conjunction is: Tara loves the beach, but sometimes she is stung by jellyfish. This is because the sentence is combining two independent clauses, and 'but' is a coordinating conjunction that connects them while showing contrast. It is similar to the revised sentence: "The DNR eventually designated the area as crucial habitat, but the protection came too late to save the nesting birds," where 'but' effectively joins two independent clauses that have different outcomes.
It is important not to create a comma splice by incorrectly joining two independent clauses with just a comma. A coordinating conjunction is necessary to join two independent clauses unless a semicolon is used. Remember, a comma by itself is not enough to join independent clauses, as seen in comma splices.