The definition a hazard is: the correct choice is : the ability of a substance to produce an unwanted effect.
A hazard is the situation which can harm you or produce an unwanted effect. the human injury , the property damage , a damage to the environment or any will occur at same time. so, an unwanted substance or the situation or the condition which loss the control of the hazard and leads to harm.
The risk is the factor of by chance something happening and will have the negative effect. the the correct option is ability of substance that produce the unwanted effect.
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