Final answer:
The person's main concern with not being assigned enough hours is the inability to pay bills due to financial constraints. Financial security is a significant aspect of this worry, as a lighter work schedule may affect stable income to cover essential living expenses.
Step-by-step explanation:
The main concern of the person who isn't getting assigned enough hours and worries about the financial consequences of having a lighter schedule than expected is the ability to pay bills. This concern falls primarily under the realm of financial security, which is a common stressor for many individuals, especially those who are juggling multiple responsibilities such as work, education, and family life. A reduced number of working hours can lead to insufficient income to cover essential expenses, thereby posing a risk to one's financial stability.
Not getting enough sleep, having difficulty managing stress, and being unable to socialize are additional concerns that can be associated with financial stress, but based on the provided information, the immediate issue is the impact of reduced hours on the ability to meet financial obligations.