Attachment theory, proposed by John Bowlby and further developed by Mary Ainsworth, explains the nature of emotional bonds between humans, particularly between parent and child. A secure and responsive attachment relationship promotes healthy development, while an insecure attachment can lead to negative effects on emotional development and mental health. There are three main types of attachment styles: secure, insecure-avoidant, and insecure-ambivalent. However, attachment theory is not deterministic, and individuals are capable of change and growth throughout their lives. Overall, attachment theory provides valuable insights into the complexities of human relationships