1) Trail users _______ follow the signs to avoid damaging the environment. a) must b) should 2) Park managers _______ involve local communities in trail maintenance. a) must b) should 3) Hikers _______ stay on marked paths to prevent erosion. a) must b) should 4) Designers _______ create trails that minimize environmental impact. a) must b) should 5) Volunteers _______ help clean up trails regularly. a) must b) should 6) Visitors _______ not leave trash in protected areas. a) must b) should 7) Bikers _______ be aware of hikers and avoid conflicts on shared trails. a) must b) should 8) Authorities _______ enforce rules to protect natural habitats. a) must b) should 9) Everyone _______ respect wildlife while enjoying outdoor activities. a) must b) should

Must / Should

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