What should be affixed to a bumper to deflect threats like rocks or firebombs?

The correct response involves using chicken wire or chainlink screens as a means to deflect potential threats such as rocks or firebombs. These materials are effective because they create a barrier that can absorb and deflect projectiles, effectively protecting the vehicle and its occupants from harm.

Chicken wire or chainlink screens are lightweight yet durable, making them practical for installation onto the bumpers of vehicles. Their structure allows for flexibility while maintaining strength, which helps in mitigating the impact of thrown objects or incendiary devices.

In contrast, while a canvas tarpaulin may offer some level of protection, it is not as robust against solid projectiles. A steel plate, although very sturdy, could add excessive weight to the vehicle and may not be as effective in preventing damage from firebombs as it could become a heat conductor. Rubber matting, meanwhile, might provide limited impact absorption but is not specifically designed or constructed to protect against the types of threats described. Thus, chicken wire or chainlink screens emerge as the most suitable choice for this application.