Final answer:
The correct verb to fill in the blanks is 'hablo' which means 'I speak' or 'I talk'.
Step-by-step explanation:
The correct verb to fill in the blanks is hablo as the subject 'yo' refers to the first person singular pronoun 'I'. The verb 'hablo' means 'I speak' or 'I talk'. Therefore, the sentence would be 'Yo hablo a muchas personas en México' which translates to 'I speak to many people in Mexico'.
Learn more about Verb conjugation in Spanish