Final answer:
Lifeguards or designated child/watchers are essential to provide constant surveillance during swimming lessons to ensure the safety of participants, prevent accidents, and respond quickly in emergencies.
Step-by-step explanation:
Yes, a lifeguard or designated child/watcher should always be providing surveillance for the entire water while lessons are being conducted to ensure the safety of all participants. This is crucial because young children are particularly vulnerable around water and can drown in various settings, including swimming pools, lakes, rivers, and even smaller volumes of water like bathtubs and buckets. Additionally, the general safety of everyone in the water depends on vigilance and awareness, which is fostered through education and the enforcement of safety rules. Lifeguards or designated watchers help prevent accidents by ensuring that no one engages in unsafe activities, such as diving in shallow water, which could lead to severe injuries. Moreover, they are trained to recognize signs of drowning—which may not always be as obvious as shouting or arm-waving—and can intervene quickly to provide assistance or emergency aid.