Question

____, or providing information supporting their policy positions to legislators, is a visible role played by interest groups. incremental policy making lobbying issue networks conducting campaign advertising

Answer 1

Lobbying or providing information supporting their policy positions to legislators, is a visible role played by interest groups. 
Lobbying are efforts that are directed primarily at the national level; committees of Congress that consider legislation, and executive departments. Those involved depend on their personal relationship with members of Congress and the executive branch, which are based on keeping in regular contract.