Under which circumstance is sexual assault defined according to the text?

The correct definition of sexual assault is encapsulated in the idea that it occurs when a person in a position of responsibility engages in sexual contact with another individual. This situation emphasizes a clear power imbalance, where one person's authority or trust over another can significantly impact the nature of consent. The reasoning behind this definition underscores the potential exploitation that can arise in scenarios where one individual has control or influence over another—such as in cases involving educators, caregivers, or authority figures.

This context is important as it highlights that consent may not be fully valid given the dynamics of responsibility and trust involved. Therefore, acknowledging this definition is crucial when considering the legal implications and protections afforded to individuals in vulnerable situations.