Final answer:
The primary influences on ground cover fire behavior include fuel type, topography, and weather. Each factor impacts how fast and where a fire spreads. Fuel represents the vegetation that burns, topography involves the geographical features of the area, and weather includes varying weather conditions.
Step-by-step explanation:
The three main influences on ground cover fire behavior are fuel type, topography, and weather. The type of fuel represents the kind of vegetation that is burning, including grass, brush, and trees. Each fuel type burns differently and at different rates. The topography of the area affects how the fire spreads. For instance, fires move up slopes faster than on level ground. Finally, weather plays a critical part in fire spread. Specifically, temperature, humidity, wind speed and direction can greatly influence fire behavior.
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