Final answer:
The correct answer is: Because of its proximity to the San Andreas Fault, San Francisco experiences many earthquakes.
Step-by-step explanation:
The correct answer is: Because of its proximity to the San Andreas Fault, San Francisco experiences many earthquakes. In this sentence, a comma is needed to separate the introductory phrase 'Because of its proximity to the San Andreas Fault' from the main clause 'San Francisco experiences many earthquakes.'
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