When the mother puts the nipple into the mouth of 3-week-old kierra, she starts sucking. this is an example of which sensorimotor substage?

The answer is simple reflexes. These are involuntary movements or actions. These aid classify normal brain and nerve activity. Some reflexes happen only in exact periods of development. And for this question, the reflex is called suck reflex. When the roof of the baby's mouth is affected, the baby will begin to suck. This reflex does not start until about the 32nd week of pregnancy and is not completely developed up until about 36 weeks.

the period of human evolution has coincided with environmental change, including ('hominin' refers to any bipedal species closely related to humans – that is, on how do we know earth's climate has changed? a map showing dates and locations of prehistoric archeological sites and migration routes from africa into.