Which of the following is an alternative form of political participation?

Protest is considered an alternative form of political participation because it involves actively demonstrating one's beliefs or opinions in a public space to influence political change. This direct action can take various forms, including marches, sit-ins, and rallies, and is often utilized to draw attention to specific issues or injustices that may not be adequately addressed through traditional political channels.

Unlike voting, which is a widely recognized and formal method of participating in the democratic process, protests often represent grassroots movements that aim to mobilize public sentiment and pressure decision-makers outside of official voting mechanisms. Registering to vote and public service are also important components of civic engagement, but they do not embody the alternative nature of participation that protests represent. These activities typically occur within established systems, while protests challenge the status quo and seek to instigate change through more disruptive means.