Answer:
D. the process by which species change as successful traits are passed on to the next generation
Explanation:
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.
 
        
             
        
        
        
Mass can either increase or decrease the speed depending on the height of the roller coaster.
        
                    
             
        
        
        
Chloroplast is once a single cell organism, a prokaryotic cell that will engulf in a eukaryotic cell. This eukaryotic cell containts a mitochondria that is developed inside a eukaryotic cell. After the two cell engulf, photosynthesis takes place which makes the prokaryotic cell evolves into a chloroplast organelles.
        
             
        
        
        
Answer:
Changes in the environment affect the food sources available for birds. For example, if a flood was to occur, there would be an abundance of fish to birds to eat. So birds with bigger beaks will be able to eat fish, to live and reproduce offspring with bigger beaks. While birds with smaller beaks will not be able to catch fish to eat, therefore decreasing the population of birds with smaller beaks.
 
        
             
        
        
        
I assume that the mushroom gets eaten by an animal. If that's not the answer you're looking for.. my apologies.