Final answer:
The quoted excerpts focus on the characters' struggles with relationships, responsibility, and life changes, particularly in relation to family and personal connections.
Step-by-step explanation:
The quoted lines discussed from different texts prominently feature the themes of relationships, responsibility, and the personal turmoil experienced by characters in the face of life-changing events. Each excerpt reflects the inner conflict or the societal expectations the characters face, particularly in the context of their family dynamics and personal bonds. Whether it's Ruth discussing Walter's needs that she cannot fulfill, Mrs. Linde's sense of emptiness after the passing of her mother and the independence of her brothers, or Editha's engagement and her approach to wartime and its impacts on personal relationships, these texts share a common thread in exploring human connections and the trials they undergo.