A business is an institution that exist to serve the need of people for goods and services in a society. discuss
Please note that no one here will do your work for you. The instruction "discuss" means that your instructor wants YOU to tell what YOU THINK this idea means and how it plays out in real life.
Please also remember basic rules of subject verb agreement: "business" is a singular noun, so the verb also needs to be singular -- "exists" not "exist."
We will be happy to read over what you come up with and make suggestions and/or corrections.
Please post what you think.