Final answer:
For preschoolers, the recommended activities should be developmentally appropriate and promote both physical and cognitive growth. Suitable activities include playing in a sandbox and engaging in outdoor play rather than structured sports like baseball or roller skating, which are not mentioned as recommendations for preschoolers.
Step-by-step explanation:
When giving a presentation about encouraging exercise in children of preschool age, the nurse should recommend activities that are suitable for their developmental level. While preschoolers can learn to hit a baseball and kick a soccer ball, they are likely not ready for structured sports like playing baseball. Instead, activities such as playing in a sandbox, which is fun for young children and also helps them learn about the world, are more appropriate. Similarly, outdoor play is greatly beneficial as it not only allows children to experience and sense the world around them but also promotes physical activity, which is essential for the development of a healthy heart and brain.
Given the options provided and considering the suitability for preschoolers, the nurse should recommend d) None of the above as specific activities like playing baseball, jumping rope, or roller skating may not be developmentally appropriate for this age group. It is crucial to promote activities that are safe, enjoyable, and contribute to the physical and cognitive development of preschool-aged children.