Read passage 2 and answers the questions following the passage. 1 Falls frequently cause accidents, serious injuries, and accidental death in the elderly. 2 Falling puts older people at a great personal risk that cannot be ignored. 3 Understanding the risks of falls and taking precautions against them can protect senior citizens from this problem. 4 Everyone is at risk for falling, regardless of age group, strength, or health status. 5 However, young children and elderly adults seem to fall most frequently, and the elderly are at the greatest rick of, falling. 6 Children's bodies are typically more resilient and resistant to injury from falls. 7 Always haphazardly on the move, toddlers typically bounce back after they topple. 8 They quickly pull themselves, up and waddle off uninjured, only to harmlessly tumble down again a few steps later. 9 In contrast, many elderly people are injured when they fall. 10 Their bodies are fragile and susceptible to injury. 11 They are frail and easily hurt. 12 They rarely "bounce back" after they topple. 13Consequently, they usually avoid living alone and risking falling with no one there to help. 14 AS people age, their eyesight, hearing, and reflexes often diminish, increasing their likelihood of falling. 15 Sometimes they do not see or hear things that might warn them of danger. 16 Frequently their adaptation to sudden changes in position diminishes. 17 Chronic illness also reduces older people's strength and balance, increasing the likelihood of falling. 18 Side effects of medications they take sometimes cause light-headedness and loss of balance. 19 Several factors often work together to make the elderly prone to falls. 20 When they do not have or use the lighting needed to see clearly as they walk in their surroundings. 21 Age and wear and tear on the body sometimes make their legs unsteady and their ankles weak. 22 Also, their reflexes typically slow down as they age. Which sentence is repetitive and unnecessary?