young matthew is playing with his mother. she has his favorite stuffed animal, and she suddenly hides it under his blanket. instead of looking for it under the blanket, matthew starts to cry a little, since he thinks his toy is gone. matthew’s tears suggest that he has not yet

object permanence

Explanation:

The understanding of the fact that even if the object is not perceivable nearby, the object is still exist is known as object permanence.

Object permanence is the branch of psychology which addresses development of the mental and the social capabilities of the young children.

Matthew's tears suggest that the child has not developed object permanence yet.

president reagan was a good presidant and should be presidant if he was still alive

explanation:

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.