When you put your finger on your newborn nephew's palm, he curls his own fingers around yours, grasping your finger tightly. you have triggered what sort of behavior?

Rooting reflex.

Explanation:

A reflex that is normally seen in the newborn babies who automatically turns the face towards the stimulus and make sucking motions from the mouth which helps in breast feeding.

This reflex also assures when the babies are given fingers around they grab it tightly.

This reflex is usually reflex actions produced in the new born due to the central nervous system in response to stimuli it disappears with age when the frontal lobes develop in them.

The Grasping reflex

Explanation:

Newborns fingers tighten around any objects placed in their palm

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