Answer:
The answer is labor shortages.
Explanation:
A labor shortage can be defined as a condition related to the economy in which employers consider that there are not the necessary qualified candidates or employees who can be in charge of the different demands concerning the marketplace.
This situation is usually considered by economists as "an insufficiency in the labor force." Wage levels are considered a factor to measure a labor shortage. However, that factor is not usually related to the way through which people perceive things.
Strain/Sprain: A strain is when a muscle has been pulled to its limit, while a sprain is a muscle twisted or turned excessively.
Heat Exhaustion: Exactly how it sounds like; exhaustion from heat. Basically, it's a heat illness that you may obtain after being in intense heat for a long time.
I believe the answer is A