Final answer:
John Bowlby described the stages of attachment in his attachment theory, which involves a healthy attachment between caregiver and child. A secure base is important for a child's sense of safety and exploration.
Step-by-step explanation:
John Bowlby described the stages of attachment in his attachment theory. According to Bowlby, attachment is an affectional bond or tie that an infant forms with their primary caregiver. He proposed that a healthy attachment involves the caregiver being responsive to the child's needs and engaging in mutually enjoyable interactions. Bowlby also defined a secure base, which is a parental presence that gives the child a sense of safety as they explore their surroundings.