Which of the following actions is an example of sexual abuse?

Rubbing up against a resident inappropriately is a clear example of sexual abuse. This action involves unwanted physical contact that is sexual in nature and violates the resident's personal space and autonomy. Such behavior can create an environment of fear, discomfort, and violation for the individual and is against the ethical standards expected of caregivers. It is essential for Certified Nursing Assistants (CNAs) to maintain professional boundaries and ensure that all interactions with residents are respectful and consensual.

In contrast, the other options involve actions that can be seen as part of appropriate caregiving practices. Discussing personal issues can be part of building rapport, offering comfort during difficult times is a compassionate response, and providing personal care assistance is a fundamental duty of a CNA. None of these actions infringe upon the personal space or consent of the resident in the same way that inappropriate physical contact does.