Which of the following best describes "sexual penetration"?

The definition of "sexual penetration" specifically refers to any intrusion of a body part or object into another person's genital or anal openings. This definition encompasses a wide range of actions that might be considered sexual penetration, going beyond just traditional intercourse. It clearly establishes the focus on physical intrusion, which is key in legal and medical contexts for identifying assault or other forms of sexual misconduct. This comprehensive definition ensures that various forms of sexual assault are acknowledged and categorized appropriately, emphasizing the importance of consent and the nature of the actions involved.

The other options are too vague or narrow to capture the full scope of what constitutes sexual penetration. For example, defining sexual penetration as any sexual encounter does not specifically address the actual act of penetration. Similarly, restricting it to intercourse between consenting adults excludes non-consensual acts, and limiting the definition to oral sexual acts fails to encompass other significant forms of penetration.