Explanation:

- Business: This involves owning, managing, or running a company to earn a profit. It's not about working for others but rather running your own venture.

- Profession: This relates to jobs that require specialized knowledge and often formal education or training, like doctors or lawyers. Professionals may work for others but can also be self-employed.

- Employment: In employment, individuals work for a company or another person and receive a salary or wages. This aligns with working for others and getting paid in return.

- None of these: This option is for if none of the options fit, which isn't the case here.