Final answer:
Child sexual abuse typically requires that abusers have access, privacy, and control over the child to perpetrate such acts. Contributing factors include substance abuse, social isolation, and a past history of mistreatment. Most abuse is carried out by someone known to the child and often goes undetected.
Step-by-step explanation:
For child sexual abuse to occur, abusers typically need access to the child, privacy to commit the abuse, and control to maintain the child's silence and compliance. The vast majority of child sexual abuse is perpetrated by someone the child knows. This may be a family member, a family friend, or another trusted individual in a position of authority over the child. Factors such as social isolation, substance abuse, and a history of being mistreated can all contribute to an environment where abuse may occur. Professionals, including teachers, law enforcement personnel, and social services staff, are responsible for reporting three-fifths of child abuse cases, but sadly, a significant amount of abuse goes undetected or unreported.