Final answer:
Wildfires generally move more quickly as they move up a mountain due to factors such as wind and the presence of rocks. However, the speed of the fire can be affected by topography and vegetation type.
Step-by-step explanation:
When sparks are added to different locations on a mountain, the wildfire will generally move more quickly as it moves up the mountain compared to when it moves down. This is because fires tend to burn more intensely uphill, especially when driven by wind. Additionally, the presence of rocks on the mountains limits the amount of grassy fuel that can accumulate, reducing the spread of the fire. On the other hand, deep gorges and higher soil moisture in the mountain zone make the area more humid and less flammable.