Answer:
In the given context, the correct definition for an employee, would be that of an individual who executes orders to buy and sell for clients of his or her brokerage firm.
Explanation:
An employee is a person who is hired by an employer to execute functions that are necessary to his organization's full operation. In the context of the stockmarket, an employee of a company would not trade for his or her account, but for his employer's account, following their policies and intentions. Therefore, an employee is an individual who executes orders to buy and sell for clients of his or her brokerage firm.