Final answer:
The underlined conjugation "Yo corre mucho" is incorrect because the correct form is "Yo corro mucho."
Step-by-step explanation:
The underlined conjugation in the sentence "Yo corre mucho" is incorrect. The correct conjugation for the verb "correr" in the yo form is "corro". In Spanish, verb conjugation depends on the subject of the sentence. Since yo means "I", the correct conjugation is "corro", not "corre".
Learn more about Conjugation of Spanish verbs