Which example illustrates a skill in the physical development and health domain?

The choice highlighting Carl's awareness of safety rules on the playground effectively represents a skill in the physical development and health domain because it emphasizes an understanding of physical safety in an active environment. Being aware of safety rules indicates that a child is not only cognizant of their environment but also capable of applying that awareness to avoid potential hazards. This reflects a critical aspect of physical health—understanding how to navigate physical spaces safely contributes to overall well-being and development.

In the context of early childhood development, focusing on safety enhances children's ability to engage in physical activities, play, and exploration, which are vital for their physical growth and health. Therefore, Carl's skill is central to the physical development and health domain, as it encompasses both cognitive understanding and practical application in a physical setting.

The other options relate more closely to cognitive and communication development rather than physical aspects. Strong foundation skills in reading and writing primarily support literacy and cognitive growth. Conversely, enjoying talking with people pertains to social-emotional development and communication skills. Thus, Carl's example is the most relevant to physical development and health.