Answer:
Cause and effect
Step-by-step explanation:
The structure employed in this sentence is one of cause and effect. We know this because the author begins by talking about an event that took place during his day: having to work through his lunch hour. However, he explains that this is the effect of a cause. The cause was being late for work. The structure of cause and effect is very effective when we want to show the connections between a series of events.