mariah acts with honesty, even when no one else is watching.

The statement "Mariah acts with honesty, even when no one else is watching" exemplifies the concept of integrity. Integrity means consistently doing the right thing and being honest regardless of whether others are present to observe or judge one's actions. It reflects a person's adherence to moral values and principles internally rather than for external recognition or reward. This is considered one of the highest ethical qualities, as it demands self-discipline and alignment with one's conscience even in challenging or tempting circumstances. In summary, Mariah's behavior demonstrates integrity, which is acting truthfully and ethically at all times, especially when alone or unobserved.