What is Bronte's main purpose in describing Jane's meals and activities at lowood?

In describing Jane's meals and activities at Lowood, Bronte's main purpose is to highlight the harsh and restrictive conditions that Jane endures at the school. By emphasizing the plain and meager meals, as well as the regimented routines and lack of comforts, Bronte contrasts Jane's experiences at Lowood with her later experiences of freedom and self-expression. This serves to underscore Jane's resilience and inner strength in the face of adversity.