Transporting substances in a cell. proteins are transported either in or out of the cell. 
        
                    
             
        
        
        
It is thigmotropism because it is not affected by gravity or light.
        
             
        
        
        
Answer:
A wildfire is an unplanned fire that burns in a natural area such as a forest, grassland, or prairie. Wildfires are often caused by human activity or a natural phenomenon such as lightning, and they can happen at any time or anywhere. In 50% of wildfires recorded, it is not known how they started.