Which of the following activities places a preschool-age child at risk for bodily harm?

Swimming in a pool unsupervised poses substantial risks for a preschool-age child due to several critical factors associated with their developmental stage. At this age, children typically lack the physical coordination and understanding of safety regulations necessary to navigate potentially dangerous situations, such as swimming without supervision. They may not recognize the dangers of water or have the skills to react appropriately in case of an emergency, such as struggling to stay afloat or facing challenges in returning to the pool's edge.

Additionally, parents and caregivers play a vital role in ensuring safety by supervising children when they are engaging in activities that could lead to injury. Being unsupervised in such a setting means there would be no immediate help available, dramatically increasing the risk of drowning or accidents. This understanding of the importance of supervision in high-risk scenarios is crucial for fostering a safe environment for preschoolers.

In contrast, while the other choices also carry risks, they do not present an immediate and high-level danger in the way that unsupervised swimming does. Leaving medications within reach can lead to accidental ingestion, tricking a child into eating a vitamin as candy can cause poisoning if the vitamin is high-dose or harmful in a large quantity, and limiting screen time has no immediate risk of bodily harm. However, these