Which of the following can cause negative behavior in children?

The presence of stress and new siblings in a child's environment can significantly contribute to negative behavior. Such changes can create feelings of insecurity, anxiety, and jealousy in children. When a family dynamic shifts, such as the addition of a new sibling, children may feel like they are losing their parents' attention, leading to behavioral issues as they seek to navigate their emotions and adjust to the new situation. This stress can manifest in various ways, including acting out, becoming withdrawn, or exhibiting other challenging behaviors.

In contrast, routine schedules, consistent role models, and calm environments are essential for promoting positive behavior in children. Routine provides a sense of security and predictability, which can reduce anxiety. Consistent role models help children understand expectations and acceptable behavior, leading to better social interactions. Calm environments promote a sense of safety and stability, contributing to emotional well-being. Thus, these factors tend to encourage positive behavior rather than causing negative reactions.