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A.all the answers are evacuation hazards

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All of the answers are excavation hazards

Explanation

In general excavation is the type of work which normally involves the removal of substances like rocks from the sites or holes which some of them are deep by the means of using machines, tools or even explosives. Working in excavations workers are at a high potential to hazards or these conditions are very risky especially when the correct measures are not taken. some examples of these hazards are cave-in which occurs when the walls of an excavation collapses. Others are Asphyxiation, fire especially when using the explosions, Inhalation of toxic fumes and many others.

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