Why is Charlotte Bronte considered as writer of realism combined with romanticism?

Why is Charlotte Bronte considered as writer of realism combined with romanticism?

She presents a vivid realistic picture of the English society by exposing the hypocrisy and evils of the upper classes, and the misery of the poor. Her writings are marked throughout by an intensity of vision and passion. Her writing are the truthful presentation of the economical, moral, social life of the time.