Final answer:
Sophia was forced into a nunnery after Peter the Great became tsar, stripping her of her political power and neutralizing any threat she might pose to his reign.
Step-by-step explanation:
What happened to Sophia after Peter became tsar? The more accurate historical event related to Sophia after Peter the Great became tsar is that she was forced into a nunnery. This occurred after Peter I (Peter the Great) consolidated his power and eliminated political rivals. Sophia, who had been a regent and a significant political figure in Russia, saw her power come to an end. In order to ensure that she would not be a threat to his reign, Peter the Great had Sophia confined to a convent, which effectively removed her from the political arena. Sophia, who had initially served as a regent during Peter's minority, was removed from political power and compelled to become a nun. This was a measure taken by Peter to consolidate his rule and eliminate potential challenges from the nobility. The decision to send Sophia to a nunnery was a relatively lenient action compared to more severe consequences that some historical figures faced during power transitions in different periods.