What defines something as being "conspicuous"?

The term "conspicuous" is defined as something that is easy to notice or obvious, aligning perfectly with the first choice. When something is conspicuous, it stands out prominently in a way that draws attention and is easily observable. This quality can apply to various contexts, such as an object that is brightly colored in a dull environment or behavior that is distinctly unusual, making it readily apparent to onlookers.

The other choices represent different concepts; being in harmony or agreement speaks to congruence, having an unduly high opinion relates to arrogance, and to comfort pertains to providing solace or ease. None of these definitions align with the essence of what it means for something to be conspicuous. Thus, the focus on easy notice and obviousness captures the core meaning of the term accurately.