Increasing the stimulation up to the maximal stimulus
        
             
        
        
        
Answer:
That layer is called the a horizon, so the answer is A.
Explanation:
 
        
                    
             
        
        
        
Answer:
It's changeable
Before the microscope, Linnaeus classified organisms only separated in two kingdoms, while more were introduced later. So, they were only classified in two kingdoms, they can be changed and  classified to more than  two.
 
        
                    
             
        
        
        
Answer:how can chemosynthetic organisms help scientists to understand how life developed on earth? for example, temperature, a species may evolve to a temperature change over time. it could alter the food sources available, and then that species would eat that food source and adapt to the energy given off by that source.
Explanation: