Learning theory and attachment comprehension

How does classical conditioning play a role in attachment formation between a caregiver and a child?

How do the research findings from Harlow and Schaffer & Emmerson challenge the learning theory explanation of attachment?

How does Bowlby's alternative theory explain the innate readiness of infants to form attachments for survival?

How does operant conditioning play a role in the formation of attachment between infants and caregivers?

How does learning theory explain the process of attachment formation in infants?