Bowlby is noted for his theory on attachment. Which of the following statements is correct regarding his theory?
1) Attachment theory focuses on the importance of early relationships in shaping a child's development.
2) Attachment theory suggests that infants form a strong emotional bond with their primary caregiver.
3) Attachment theory proposes that secure attachments in childhood lead to positive social and emotional outcomes in adulthood.
4) Attachment theory emphasizes the role of internal working models in shaping future relationships.