People form special-interest groups to strengthen their voice, pool their resources and improve their ability to influence the decisions of government officials.
Explanation:
Special interest groups can be defined as the community or group of the people who works for the same interest of the people in the flied of knowledge and learning where members are able to influence/affect or produce solutions within their particular area by collaborating, organizing meeting, conferences with the concerned organizations.
These communities take care or support of the needs and interest of the people who are not able to get these opportunities due to the error in the working of the government.
The right answer is (2) People form special-interest groups to strengthen their voice, pool their resources, and improve their ability to influence the decisions of government officials.