What age-related factor significantly increases the likelihood of falling injuries?

The question addresses the age-related factors that contribute to an increased likelihood of falling injuries. The correct choice encompasses the fact that both poor vision and muscle weakness are significant risk factors for falls, particularly in older adults.

As people age, their visual acuity often declines, which affects their ability to accurately judge distances, detect hazards, or respond quickly to their environment. This diminished vision can lead to missteps and falls, making poor vision a critical factor in fall risk.

Additionally, muscle strength tends to decrease with age, leading to muscle weakness, which compromises balance and stability. Strong muscles are essential for supporting the body and maintaining coordination during movement. When muscle strength diminishes, an individual may struggle to catch themselves or recover from an unbalanced position, thereby increasing the risk of falling.

By recognizing that both poor vision and muscle weakness significantly heighten the likelihood of falls, the correct answer reflects the combined impact of these two factors on fall risk among older adults. Therefore, saying that all of the above factors contribute collectively to the increased risk of falling is entirely justified.