The goal is to ensure that preventable falls do not exceed 25% of the total falls in any unit. To determine which units meet this goal, we need to calculate the percentage of preventable falls for each unit:

Unit 1:

Total Falls: 14

Preventable Falls: 7

Percentage: (7/14) * 100 = 50%

Does not meet the goal (50% > 25%).

Unit 2:

Total Falls: 9

Preventable Falls: 3

Percentage: (3/9) * 100 = 33.33%

Does not meet the goal (33.33% > 25%).

Unit 3:

Total Falls: 3

Preventable Falls: 2

Percentage: (2/3) * 100 = 66.67%

Does not meet the goal (66.67% > 25%).

Unit 4:

Total Falls: 1

Preventable Falls: 0

Percentage: (0/1) * 100 = 0%

Meets the goal (0% < 25%).

Unit 5:

Total Falls: 2

Preventable Falls: 1

Percentage: (1/2) * 100 = 50%

Does not meet the goal (50% > 25%).

Based on these calculations, only Unit 4 meets the goal. However, the Unit 5 is incorrectly assessed, as 50% does not meet the threshold of 25%. Hence, the correct answer is Unit 4 only. Please ignore the earlier verified statement.