Which of the following is a characteristic of the human visual system’s adaptation?

The human visual system's adaptation refers to its ability to adjust to varying lighting conditions and distances, which is essential for optimal visual perception in diverse environments. This characteristic allows for enhanced vision in both dim and bright settings, enabling individuals to perceive their surroundings clearly regardless of changes in light intensity.

For example, when moving from a dark area into bright sunlight, the pupils constrict to reduce the amount of light entering the eye, and the visual system recalibrates to maintain clarity and detail perception. Additionally, when focusing on objects at various distances, the eye accommodates by changing the shape of the lens, ensuring that images remain sharp.

This adaptability is crucial for navigating different environments and recognizing objects at various distances without the need for constant movement, making option B the correct choice.