Acceleration/ accelerating is how you are increasing speed. Speed as a whole is how fast something goes, acceleration is how something’s speed increases and by how much.
        
                    
             
        
        
        
Because it can cause some very bad cramps in the stomach
        
             
        
        
        
Zea diploperennis<span> is a wild relative of maize that is endemic to the Sierra de Manantlán Biosphere Reserve in Mexico. Because this species is a priority for conservation in the reserve, the effects on its populations of the most common types of anthropogenic disturbance – slash-and-burn, and slash without subsequent burning – were investigated in three populations for 5 years</span>