Final answer:
The most common forms of aggressive behavior in middle childhood are physical and verbal aggression, influenced by various factors such as family dynamics, peer relationships, and exposure to media violence.
Step-by-step explanation:
The most common forms of aggressive behavior in middle childhood are physical and verbal aggression, including behaviors like hitting, pushing, name-calling, and teasing. These aggressive behaviors can be influenced by various factors such as family dynamics, peer relationships, exposure to media violence, and societal norms. It is important to note that aggressive behavior is not limited to early childhood and can continue into middle childhood.