An accident is a( event that usually results in injury or loss.
a. unexpected
b. plannedan accident is a(n)
a. unexpected event that usually results in injury or loss.

a. unexpected

Explanation:

Among the numerous concepts offered at the end, it stands out that, because of its power of synthesis and practice, proposes to define them as: the chain of events and circumstances that lead to the occurrence of an unexpected and unintentional injury.

To prevent them and avoid the loss of people and material damage, actions must be carried out to locate the risks, improve the safety conditions of the equipment and educate workers on how to avoid them.

the answer is