Abuse refers to an act
committed by a parent, caregiver or person in a position of trust
which is non-accidental and
which harms or threatens to harm
[someone’s] physical or mental health or [someone’s] welfare.
Physical abuse is generally defined as "any nonaccidental physical injury to the child" and can include striking, kicking, burning, or biting the child, or any action that results in a physical impairment of the child.
Injury to the psychological capacity or emotional stability of the child as evidenced by an observable or substantial change in behavior, emotional response, or cognition.
and
injury as evidenced by "anxiety, depression, withdrawal, or aggressive behavior."
Failure of a parent or other person with responsibility for the child to provide needed food, clothing, shelter, medical care, or supervision to the degree that the child's health, safety, and well-being are threatened with harm.
Child sexual abuse is evidenced by activity between a child and an adult or another child who by age or development is in a relationship of responsibility, trust or power, the activity being intended to gratify or satisfy the needs of the other person.