Answer:
under the first blanket
Explanation:
In the question above, the eight-month-old child is in the sensorimotor stage of cognitive development and more specifically in the second sub-stage of sensorimotor stage i.e, secondary circular reaction.
According to Piaget, a child who is in the secondary circular reactions' sub-stage possesses the age between four to eight months. In this sub-stage, a child is more focused towards the world around him or her and therefore purposefully repeat a specific behavior in order to get a similar response from the surrounding environment. A child often becomes "object-oriented" at this stage.