The vision of older adults can be affected by age-related changes. One of these changes, which can make steps or street curbs difficult to manage, is a decline in: A cye-hand coordination. B depth perception. C ocular elasticity. D color vision.

## Step 1<br />The problem is asking us to identify which of the given options is a change that can make steps or street curbs difficult to manage for older adults. The options are: A) eye-hand coordination, B) depth perception, C) ocular elasticity, and D) color vision.<br /><br />## Step 2<br />We need to understand what each of these options means. <br /><br />- Eye-hand coordination refers to the ability to coordinate visual input with hand movements. <br />- Depth perception is the ability to perceive the world in three dimensions and to judge the distance of objects. <br />- Ocular elasticity refers to the ability of the eye to change its shape to focus on objects at different distances. <br />- Color vision is the ability to distinguish different colors.<br /><br />## Step 3<br />Considering the context of the problem, which is about managing steps or street curbs, the most relevant factor would be depth perception. This is because depth perception allows us to judge the distance between ourselves and the steps or curbs, which is crucial for navigating them safely.