Question

contrast and compare physical, chemical and biological hazar

Answer 1

The objects or materials or some actions that can cause harm to some one are the physical hazards
Chemical hazards are chemicals that can cause illness or injury and are made up of mostly inanimate material
biological hazard are compounds that are either living or arise from living organisms and pose threat to the well being of an individual

Answer 2

Explanation:

The maintenance of law and order in district is the principal duty of the District Collector. ... As an Executive Magistrate, he was responsible for the maintenance of law and order and as a JudicialMagistrate, he was responsible for the trial of criminal and civil cases by interpreting the laws.