Which of the following is a method for testing bathwater temperature for children?

Testing bathwater temperature on your wrist is an effective and practical method for ensuring that the water is safe for children. The skin on the wrist is sensitive enough to detect hot or cold temperatures without the risk of burns that might occur if a person were to test with their hand or foot, as those areas have less sensitivity. By using the wrist, a caregiver can get an immediate sense of the water's warmth and adjust it accordingly to ensure it is comfortable for a child.

In contrast, solely relying on a thermometer may not account for the subjective comfort level of the water, and it doesn’t provide a quick assessment for immediate safety. Submerging a toy might not accurately reflect the actual temperature a child would feel. Allowing children to feel the water could lead to a situation where they inadvertently touch water that is too hot or cold, which may expose them to danger before proper adjustments are made. Therefore, using the wrist remains the safest method for quickly and effectively assessing water temperature for children's baths.