One of the earliest studies into the nature of attachment relationships was conducted by Harry Harlow. His research established the importance of ________ in the formation of such bonds.

A) sight
B) touch
C) hearing
D) scent

Attachment Relationships

The emotional bonds that form between individuals, particularly between a child and caregiver, influencing personal development and future interpersonal relationships.

Harry Harlow

An American psychologist best known for his maternal-separation and social isolation experiments on rhesus monkeys, demonstrating the importance of caregiving and companionship.