Final answer:
An uproar is usually triggered by a loud noise or a surprising event that disrupts the normal state of affairs and elicits a strong reaction from people or, in the case of infants, a startle response.
Step-by-step explanation:
An uproar is typically caused by an event that is loud or surprising enough to cause public disturbance or strong reactions. A loud noise, such as the sound of breaking glass, a car honking, or thunder, can certainly trigger an uproar. Similarly, a surprising event, like a sudden commotion or an unexpected movement, can also result in an uproar as individuals react to unexpected or startling circumstances.
In the context of babies, events like a loud noise can startle them, causing them to blink and turn towards the source. Environmental disturbances, whether caused by human activities or natural events, can create a sensory input that is significant enough to disrupt the usual state of affairs, leading to an uproar. Even in adults, a sudden loud sound can break through attentional filters and draw immediate attention, highlighting our innate response to loud or sudden disturbances.