What does sexual assault encompass according to the definition provided?

Sexual assault is defined as a range of nonconsenting sexual activities, making the first option the most accurate. This definition recognizes that sexual assault is not limited to a single act but includes various behaviors that occur without consent. This can encompass everything from unwanted touching to coerced sexual acts, reflecting the understanding that consent is a fundamental component of any sexual encounter.

The other choices do not capture the breadth of behaviors that sexual assault includes. For instance, limiting the definition to only penetration without consent excludes other significant forms of sexual violation. Additionally, consensual sexual activities that become uncomfortable fall outside the definition of sexual assault, as consent is crucial to distinguishing between acceptable and unacceptable behavior. Lastly, private acts that do not involve physical contact also do not fit within the definition, as sexual assault specifically relates to nonconsenting sexual activities, which can involve physical touch. Thus, the most comprehensive and accurate representation of sexual assault is found in the first option.