Answer:
chemical, biological, physical, and ergonomic hazards.
Step-by-step explanation:
Based on the industrial hygiene, this kind of hazards, will be classified, does not matter if they are solid, liquid or gas.
Some examples of physical hazards will be noise, light, radiation.
some examples of biological hazards will be mould, viruses, animal allergens.
some examples of chemical hazards will be acids, bases, organic vapors.
some examples of ergonomic hazards will be the chairs, workstations.
Hope this info is useful.