Answer:

1 chemical hazard are any substance that can cause a health problem when ingested or inhaled

2 biological hazard are organic substances that present a threat to the health of people and other living organisms.

3 physical hazard substances or activities that threaten your physical safety

4 psychological hazard aspects of the work environment and the way that work is organised that are associated with mental disorders and/or physical injury or illness.

5 ergonomic hazard are workplace situations that cause wear and tear on the body and can cause injury.