What is the importance of mrs. linden and krogstad in A Doll's House?

Mrs. Linde and Krogstad serve as crucial foils to the main characters in "A Doll's House," highlighting themes of sacrifice, morality, and personal growth. Mrs. Linde's pragmatic approach to life contrasts with Nora's initial naivety, illustrating the realities of women's roles and societal expectations. Krogstad's transformation from a morally ambiguous character to one seeking redemption underscores the complexities of human relationships and the potential for change. Together, they catalyze Nora's awakening and ultimately influence her decision to seek independence.