Answer: Labour market
Explanation: The labour market is where employers and potential employees are brought together and can interact with one another. Employers look for the best workers who can do the job while the workers try to compete to get the best jobs that will satisfy their needs. In this way demand and supply occurs. The organisation's need for workers is the demand, and the workers who are willing and able to work is the supply.
The large pool communicated here is the labour market. Ally's applesauce is looking in the unskilled labour market specifically, so in this case the market consists of unskilled labour due to a high unemployment rate.