Final answer:
The correct conjugation for the subject 'Yo' (I) in present tense is 'estudio'
Step-by-step explanation:
The correct option to complete the conjugation of 'study' in the present tense for the subject 'Yo' (I) is A. estudio.
In Spanish, verbs are conjugated according to the subject pronoun. For the subject 'Yo', which means 'I', the verb 'study' is conjugated as 'estudio'. This form indicates that the action of studying is being done by the speaker.
For example:
Yo estudio matemáticas todos los días. (I study math every day.)
Learn more about Spanish verbs