Concept:Pressure groups influence the government through collective actions such as strikes.
Explanation:Pressure groups are organisations that seek to shape public policy without seeking political power.
One common method they use is strike action.
Members stop work and hold protests to attract government attention.
They do this to force the government to consider or change policies that affect their interests.
Political parties, traders, and parliamentarians do not typically rely on strikes as their main tool of influence.
Strike action is therefore a recognised strategy of pressure groups.
Answer:D. pressure groups