Final answer:
The three major causes of brain damage in early childhood are physical blow to the brain, disease growths in the brain, and chemical imbalance in the brain.
Step-by-step explanation:
The three major causes of brain damage in early childhood are physical blow to the brain, disease growths in the brain, and chemical imbalance in the brain. Brain injuries can result from falls, car accidents, violence, sports injuries, and war and combat. Falls are the most common cause of brain injuries, particularly in older adults and young children.