Answer:
Lots of effort and risk for possibility of loss
Step-by-step explanation:
Entrepreneurs stake their money and time into a business that has the possibility to not be successful or even fail, losing them money. Employees get paid by a business up until it runs out of money and lets them go, then they're done working. A business owner has to put their money into payroll, product, equipment, a lease, licenses and fees, then put a lot of time into the business, and they don't make any money until the business does (unless they pay themselves first from gross reciepts, which generally means the business is either raking it in or will be out of business by the end of its creditor's next billing cycles)
Contrast this to being an employee of a business, where you recieve pay for your work, health insurance, pto, 401k or a pension. The only reason you start a business is because you are willing to put in a lot of time an effort in hopes of making money and take a chance of losing it all. Hopefully you don't lose it all and after a few years you make a lot of money. But most small businesses fail within 3 years.