Concept:Pressure groups are organized interest groups that influence government policy without contesting elections.
They act as a communication link between the government and the public.
Explanation:Pressure groups focus on specific interests such as labor, business, or civil rights.
They do not draw up party manifestoes or sponsor candidates as political parties do.
Their main role is to voice the concerns and demands of citizens to those in authority.
By doing so, they help the government test public reaction to proposed policies or laws.
They also gather opinion and feedback from the grassroots.
Through lobbying, dialogue, and public campaigns, they make government aware of how policies affect different sections of society.
This two-way communication makes the correct option clear.
Answer:D. means by which government ascertain public reactions to their policies