Research by Renée Baillargeon and her colleagues documents that infants as young as 3 to 4 months expect objects to be , in the sense that other objects cannot move through them, and , in the sense that objects continue to exist when they are hidden.

Substantial , Permanent

Explanation:

According to the research conducted by Renée Baillargeon, infant tends to display the concept of object permanence when experiments were conducted with them. Infants cognition ability was studied which resulted in surprise on infants action.

Infants tends to look on object or situation that are considered impossible event for longer amount of time .Infants tend to be surprised because impossible event violated the expected objects behavior or action. Thus, they expect object as considerable or substantial and that it would exist even if they cannot be seen or sensed as per object permanence concept.

answer; pentagon papers, vietnam draft-resistor, james dean, american revolution;

answer; u.s senate;