Answer :
The sentence provided is not complete but a comma splice. It can be corrected either by splitting into two sentences or using a conjunction with a comma.
The sentence in question, 'Aimée Marcoud, a trapeze artist, performed under the name Miss Fillis, she retired at the age of fifty-five.' is not a complete sentence; rather, it is an example of a comma splice, which is a type of run-on sentence.
In this sentence, two independent clauses are improperly connected with a comma without a coordinating conjunction. A comma splice can be corrected by changing the comma to a period, semicolon, or by adding a conjunction (such as 'and' or 'but').
A correct version of the sentence could be: 'Aimée Marcoud, a trapeze artist, performed under the name Miss Fillis. She retired at the age of fifty-five.' or 'Aimée Marcoud, a trapeze artist, performed under the name Miss Fillis, and she retired at the age of fifty-five.'
