While being governor of Georgia, Jimmy Carter addressed the issues of Civil Rights, segregation and discrimination based on race AND socioeconomic discrimination and disparity (especially the socioeconomic status' effect on education).
The correct answer is labor. Labor is work. When an employee completes work it is called labor.
An independent contractor is the correct answer.
Independent contractors are businesses, corporations or people who provide some kind of goods or services to another person or organization under a contract between them. In order for a person to be considered self-employed, or an independent contractor, he/she must be free from the client's control, be able to control the manner and methods to accomplish the end-result, and be responsible for the delivery of the good and service under the terms of the contract.
Number 1 I hope it helps :D