Which of the following characteristics does a successful investigator need to develop proficiency in observation?

A successful investigator must possess curiosity to develop proficiency in observation. Curiosity drives the investigator to seek out details, ask questions, and explore the intricacies of a situation that may not be immediately obvious. This inquisitive nature encourages them to not only look at what is apparent but also to dig deeper, uncovering information that may have been overlooked by others.

While patience, knowledge, and even physical strength can contribute to an investigator's effectiveness, they are secondary to the intrinsic motivation and desire to uncover the truth that comes from curiosity. Without curiosity, an investigator might become complacent, missing key observations that could lead to breakthroughs in a case.