Lobbying: This is the act of attempting to influence decisions made by officials in the government, most often legislators or members of regulatory agencies.
Civil Disobedience: This is the active refusal to obey certain laws, demands, and commands of a government without resorting to physical violence. It's like refusing to do your homework as a protest against too much workload.
Social Movement: A large group of people working together to achieve a specific political or social change. Like fans supporting their favorite sports team but instead fighting for societal changes.