I’m going to say b because that’s what it means era means a long period of time in history historically
To hold back fire from homes, trees should have all branches trimmed within 6-10 feet of the ground to stop grass fires from reaching the canopy. Additionally, the branches of the trees should be at least 15 feet away from the chimneys.
Trimming the trees regularly is suggested to avoid any kind of wildfire incidents. Removing the dead leaves, grass, pine needles and weeds is necessary to prevent wildfires.
During dry seasons like fall and dry spring, keeping the yard clean of dry branches and twigs would help. Grass should also be trimmed to shorter than 4 inches during the dry season.
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To go against opposing forces with a stronger force to help fight them
