Tonka is actively playing with his toy truck when his mom accidentally drops a towel she is carrying directly on top of the vehicle. as soon as the vehicle is covered, tonka turns his head away and calmly begins playing with another toy. tonka's reaction best illustrates a lack of

The answer to this question is object permanence.
object permanence refers to a mental understanding that an object is still stays in that place eventhough we stop observing it.
The ability for infants to understand the concept of object permanence started to develop when the infants enter the age of 4-7 months old.

Same brother sorry just need points