Final answer:
Based on the information in the reading, Alex's attachment style in adulthood is best described as secure attachment.
Step-by-step explanation:
Based on the information provided in the 'Attachment Through the Life Course' reading, Alex's attachment style in adulthood can be described as secure attachment.
Insecure attachment styles include avoidant attachment, anxious-ambivalent attachment, and disorganized attachment. In the case of secure attachment, adults prefer their attachment figure over strangers, use them as a secure base, and seek them out in times of stress. They have caregivers who are sensitive and responsive to their needs.
Secure attachment is considered the healthiest type of attachment, as it promotes emotional security and overall well-being.