Which range of distances between interior opposing surfaces presents an entrapment hazard on playgrounds?

Playground safety guidelines state that open spaces between play equipment should be no greater than 3.5 inches and no smaller than 9 inches. This range is important because it prevents children from getting trapped and potentially injured. Option A (2 to 4 inches) is incorrect because it is too small and does not allow for proper ventilation. Option C (5 to 10 inches) is also incorrect because it falls outside of the recommended range. Option D (6 to 8 inches) is too small and may cause entrapment, while still not allowing for proper ventilation. Therefore, option B is the correct answer as it falls within the recommended range and promotes safety on playgrounds.