Final answer:
The most common trigger for shaking a baby is not a normal phase in infant development.
Step-by-step explanation:
The most common trigger for shaking a baby, according to the Shaken Baby Alliance, is inconsolable or excessive crying, which is false to be a normal phase in infant development. Shaking a baby can cause serious harm and even death due to the fragility of their developing brain and neck muscles.
Learn more about Shaken Baby Syndrome