5. Volunteers wear gloves when handling plants. (advice)
They should wear gloves when handling plants.
6. You see rare birds if you visit at dawn. (possibility)
You can see rare birds if you visit at dawn.
7. Visitors not feed wild animals. (prohibition, strong)
Visitors must not feed wild animals.
8. We finish the report by Friday. (necessity - moderate)
We must finish the report by Friday.
3. They recorded sightings. →
Sightings were recorded.
4. The guide shows the students new species. →
The students are shown new species.
7. The writer volunteered at a local nature reserve
8. In the mornings, the writer helped keep trails clear