Diego is in the Strange Situation with his caregiver; he explores the room and examines the toys that have been placed in it. He uses the caregiver as a secure base from which to explore the room. He would be classified as being:

Securely Attached

Explanation:

 According to the given question, the Diego exploring and also examining the toys in the room with caregiver and it is classified in the form of securely attached as the secure attachment is one of the type of attachment style which is typically characterized in the form of positive response.

The Diego is basically using the caregiver in the form of secure base or form as they shows some distress when the caregiver leaves them alone.    

Therefore, Securely attached is the correct answer.

can you explain it better

answer; psychological influences;