The infants in the strange situation who waver as they move from mother to toys, are hesitant to explore, are cautious when meeting the stranger, are very upset when mother leaves, and push their mother away at the reunion are the category of

Insecurely attached.

Explanation:

Infants that are insecurely attached have learned that adults are not to be trusted. Children who have had negative encounters with their caregivers tend to develop insecure attachment.

Children with insecure attachment refuse to associate with others, show fear and anger.