Final answer:
The "trough" in reference to short-term economic fluctuations is the low point of economic activity prior to a recovery.
Step-by-step explanation:
The "trough" in reference to short-term economic fluctuations is the low point of economic activity prior to a recovery. It marks the end of a recession and the beginning of an economic upswing. For example, during the most recent recession caused by the COVID-19 pandemic, the trough was reached in May 2020.