Roberto, a toddler, is left with a stranger in a room when his mother leaves for a few minutes. he is very upset and difficult to calm in his mother's absence. when his mother returns, he approaches her but later resists by fighting against being held. according to ainsworth and her colleagues, roberto most likely belongs to the attached group.

Roberto most likely belongs to the AMBIVALENTLY attached group.

Explanation:

An ambivalently attached group refers to those children with a mother who are not sensitive to their emotional needs and doesn't encourage the child's own independence. They treat their child as a child and not give them opportunity to develop their own independence.

The child then become attached to the mother in such that when they are not around the child becomes anxious .

These children are very likely to be immature, clingy and difficult to calm down in the absence of their mothers.

They have a fear of being abandoned.

d. the polar jet stream   lies between the polar easterlies and trade winds should be your answer