Final answer:
The correct form of hablar to complete the sentence is habla.
Step-by-step explanation:
The correct form of hablar to complete the sentence is habla.
The subject ella refers to the third person singular, so the verb form used should also be in the third person singular form.
For example, if the sentence is 'Ella habla mucho', it translates to 'She talks a lot'.
Learn more about Spanish verb conjugation