A construction activity that is at risk for contact with underground energized electrical system is: excavation activity.
In construction activities there are several risks, but there are some activities in which there is a greater risk of coming into contact with underground energized electrical systems, such as: excavation activities, earth drilling activities, activities that use pneumatic hammers, and fence installation activities.
What is a risk?
A risk is the probability that an unfavorable or adverse event will occur within a certain time frame during the development of an activity.
Learn more about risk at: brainly.com/question/1224221
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