Answer:
Employment is a source of income. Other sources of income include: Investments, Rental income, Royalties.
Investment is the commitment of a resource to a long-term increase in value. It necessitates the loss of a current resource, such as time, money, or effort.
FICA stands for Federal Insurance Contributions Act. It's a federal payroll tax that's deducted to fund social security and Medicare. FICA contributions are mandatory and are paid directly from employees' wages by their employers.