Final answer:
To maintain parallel structure using gerunds, the corrected sentence should read: 'The Mandalorian considered leaving or talking.'
Step-by-step explanation:
To correct the parallel structure in the sentence using gerunds, we need to match the -ing form of the verb used in the first part of the sentence, 'leaving'. Therefore, the sentence should become:
The Mandalorian considered leaving or talking.
This maintains the parallel structure by using gerunds ('leaving' and 'talking') for both actions considered by the Mandalorian. The consistency of the gerund form creates a rhythm and balance in the sentence, which is important for clear and effective writing.