Parotid beacuse it include both sublingual and submandible and present near the ear
        
             
        
        
        
Answer: B: Mutation increase variety in a population.
Explanation:Mutations are changes to an organism's DNA and are an important driver of diversity in populations. Species evolve because of the accumulation of mutations that occur over time. This mutation has introduce a new allele into the population that increases genetic variation and may be passed on to the next generation.
 
        
             
        
        
        
You can gather information from both actions.
        
             
        
        
        
Answer:
Grass
Explanation:
Grass is the producer in the given food chain.
Note : -
Grasses are green plants which synthesize food ( carbohydrate ) in presence of sun light in the process of photosynthesis. That's why grass is called producers.
 
        
                    
             
        
        
        
Answer:
D. Some cells can support life independently. Other cells support life collectively
Explanation:
Unicellular organisms are able to support their own life without the support of more than 1 cell. While some organisms needs multiple cells to function.