What is an interest group? What three major types of interest groups exist, and what are their goals regarding U.S. foreign policy? Give an example of an issue on which each group might lobby

One current foreign policy issue is the production of nuclear weapons in Iran. How might each type of interest group try to influence foreign policy on that issue?

What will be an ideal response?

An ideal response will:
1, Define an interest group as a group or organization that advocates and lobbies for policies that will meet its particular interests and needs.
2, Describe ethnic lobbies as interest groups that advocate for policies focusing on specific foreign states, such as foreign aid to a country or pressure against a foreign state's governing regime.
3, Discuss business groups as interest groups that lobby for policies favorable to their business interests, such as an increase in defense spending that would benefit companies producing or selling military goods or free trade discussions with a country in which a multinational corporation is interested in doing business.
4, Identify think tanks as groups that support and publicize the work of scholars, many of whom have foreign policy expertise, and that may seek to alter public opinion and put pressure on the government by offering foreign policy insights and opinions.
5, Outline an example of an ethnic lobby's interest in Iran, for example, a group with ties to Israel might lobby for the United States to send weapons to Israel so that the country can protect itself from Iran.
6, Provide an example of a business group's interest in Iran, for example, a multinational oil company might lobby for diplomatic measures rather than economic sanctions or military intervention to prevent having the company's oil supply disrupted.
7, Note an example of how a think tank might become involved in the Iran issue, for example, by publishing articles about the pressing need to stop nuclear proliferation and encouraging the public to pressure the government for stronger interventions, whether through economic sanctions or even military action if needed.