Final answer:
The appropriate age to use reasoning when addressing negative behavior in children is school age (between six and ten years old), as children in this age range have expanded cognitive skills and can understand concepts such as cause-and-effect relationships and planning towards goals. However, emotional development and self-esteem can still be fragile.
Step-by-step explanation:
The appropriate age to use reasoning when addressing negative behavior in children is school age, which typically refers to children between the ages of six and ten. During this stage of development, children have expanded cognitive skills and are capable of understanding concepts such as cause-and-effect relationships, time concepts, and planning and working towards goals. However, it is important to note that emotional development and self-esteem can still be somewhat fragile during this age range.