What are the main concerns of children's safety rules?

The correct choice encompasses all the critical aspects of children's safety rules, recognizing that safety in a learning environment involves multiple dimensions.

When we consider the proper use of materials and property, ensuring that children understand how to handle equipment and classroom items responsibly is crucial. This not only protects the children from potential injuries but also helps preserve the learning environment.

Addressing the concern of not hurting themselves or others is fundamental to any safety protocol. It's vital for children to learn about personal space, the importance of gentle interactions, and how to engage in play safely to prevent accidents and injuries.

Maintaining order in the classroom contributes to safety as well. A structured and organized environment minimizes chaos and can prevent accidents that might occur during free play or transitions between activities.

Since each of these elements directly relates to children's safety, the comprehensive nature of the choice combines all necessary components, making it the most accurate response.