Final answer:
Freud believed that infants become attached to their mothers because they fulfill the child's emotional needs. Bowlby's attachment theory emphasizes the importance of the caregiver being responsive to the child's physical, social, and emotional needs. Harlow's studies on monkeys support the idea that comfort and security play a crucial role in maternal-infant bonding.
Step-by-step explanation:
Freud believed that infants became attached to their mothers because they fulfill the child's emotional needs. According to Bowlby's attachment theory, a healthy attachment between parent and child is characterized by the caregiver being responsive to the child's physical, social, and emotional needs. Harlow's studies on monkeys also showed that feelings of comfort and security are critical components to maternal-infant bonding.