Final answer:
An infant rooting for a nipple and sucking is an example of the instinct of survival in newborns.
Step-by-step explanation:
An infant rooting for a nipple and sucking is an example of the instinct of survival in newborns. The rooting reflex is an automatic response where infants turn their head towards a touch on their cheek, seeking the nipple. Once the nipple is found, the sucking reflex kicks in as a way to obtain nourishment. This behavior is crucial for their survival in the early stages of life.
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