Final answer:
Individuals and grassroots organizations influence public policy through voluntary participation in civic actions, while businesses use lobbying and resources to sway legislation. Astroturfing is a technique that masks interest group strategies as grassroots movements.
Step-by-step explanation:
When it comes to influencing public policy, individuals and grassroots organizations often initiate change from the bottom up by capturing the attention of the policymakers through high levels of voluntary participation in events like marches and demonstrations. In contrast, businesses and corporations may exert their influence through lobbying, funding campaigns, and using their resources to sway opinion and legislation. The technique of Astroturfing is used by some interest groups to create the impression of widespread grassroots support, although the movement is orchestrated from the top down. This tactic can influence public policy by creating artificial public opinion that appears to be organic.
Political parties, interest groups, the media, and individuals contribute to the public policy process by advocating for different issues, mobilizing supporters, shaping public opinion, and voting. Ultimately, both grassroots efforts and corporate strategies are essential components of the public policy landscape, each with its unique strengths and methods of influence.