Which of the following terms is synonymous with relentless determination?

The term that embodies relentless determination is "tenacity." Tenacity refers to the quality of being very determined and persistent, often in the face of difficulties or challenges. This characteristic captures the essence of someone who is unwavering in their pursuit of goals, demonstrating an unyielding spirit and resilience.

In contrast, the other options do not convey this sense of determination. Indifference suggests a lack of interest or concern, which is the opposite of being determined. Obliviousness indicates a lack of awareness or sensitivity to one's surroundings or circumstances, rather than a committed pursuit of a goal. Stagnation refers to a state of inactivity or lack of growth, which conflicts entirely with the idea of relentless effort and determination. Therefore, tenacity is the most fitting choice to describe someone with an unwavering commitment to their objectives.